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764470801 = 3720661373
BaseRepresentation
bin101101100100001…
…110011000010001
31222021111010210101
4231210032120101
53031201031201
6203505132401
724641615563
oct5544163021
91867433711
10764470801
11362584256
1219402a101
13c24c32b3
147375b333
15471a9d01
hex2d90e611

764470801 has 4 divisors (see below), whose sum is σ = 785132212. Its totient is φ = 743809392.

The previous prime is 764470799. The next prime is 764470859. The reversal of 764470801 is 108074467.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 683038225 + 81432576 = 26135^2 + 9024^2 .

It is a cyclic number.

It is not a de Polignac number, because 764470801 - 21 = 764470799 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 20661373 = 764470801 / (7 + 6 + 4 + 4 + 7 + 0 + 8 + 0 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (764470891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10330650 + ... + 10330723.

It is an arithmetic number, because the mean of its divisors is an integer number (196283053).

Almost surely, 2764470801 is an apocalyptic number.

It is an amenable number.

764470801 is a deficient number, since it is larger than the sum of its proper divisors (20661411).

764470801 is a wasteful number, since it uses less digits than its factorization.

764470801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20661410.

The product of its (nonzero) digits is 37632, while the sum is 37.

The square root of 764470801 is about 27649.0651017354. The cubic root of 764470801 is about 914.3664883331.

The spelling of 764470801 in words is "seven hundred sixty-four million, four hundred seventy thousand, eight hundred one".

Divisors: 1 37 20661373 764470801