641327760 has 80 divisors (see below), whose sum is σ = 2209025280. Its totient is φ = 171020160.

The previous prime is 641327723. The next prime is 641327773. The reversal of 641327760 is 67723146.

641327760 is a `hidden beast` number, since 641 + 3 + 2 + 7 + 7 + 6 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×641327760² = 822602591493235200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 146296 + ... + 150615.

It is an arithmetic number, because the mean of its divisors is an integer number (27612816).

Almost surely, 2^641327760 is an apocalyptic number.

641327760 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

641327760 is an abundant number, since it is smaller than the sum of its proper divisors (1567697520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

641327760 is a wasteful number, since it uses less digits than its factorization.

641327760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296933 (or 296921 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 36.

The square root of 641327760 is about 25324.4498459493. The cubic root of 641327760 is about 862.3694169036.

The spelling of 641327760 in words is "six hundred forty-one million, three hundred twenty-seven thousand, seven hundred sixty".