76783645 has 8 divisors (see below), whose sum is σ = 97560504. Its totient is φ = 57813504.

The previous prime is 76783643. The next prime is 76783667. The reversal of 76783645 is 54638767.

It can be written as a sum of positive squares in 4 ways, for example, as 1058841 + 75724804 = 1029^2 + 8702^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 76783645 - 2¹ = 76783643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 76783595 and 76783604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76783643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 451584 + ... + 451753.

It is an arithmetic number, because the mean of its divisors is an integer number (12195063).

Almost surely, 2^76783645 is an apocalyptic number.

It is an amenable number.

76783645 is a deficient number, since it is larger than the sum of its proper divisors (20776859).

76783645 is a wasteful number, since it uses less digits than its factorization.

76783645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 903359.

The product of its digits is 846720, while the sum is 46.

The square root of 76783645 is about 8762.6277451459. The cubic root of 76783645 is about 425.0332523002.

The spelling of 76783645 in words is "seventy-six million, seven hundred eighty-three thousand, six hundred forty-five".