641913057 has 12 divisors (see below), whose sum is σ = 959180820. Its totient is φ = 413185248.

The previous prime is 641913053. The next prime is 641913067. The reversal of 641913057 is 750319146.

641913057 is a `hidden beast` number, since 641 + 9 + 1 + 3 + 0 + 5 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 485937936 + 155975121 = 22044^2 + 12489^2 .

It is not a de Polignac number, because 641913057 - 2² = 641913053 is a prime.

It is not an unprimeable number, because it can be changed into a prime (641913053) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1229458 + ... + 1229979.

It is an arithmetic number, because the mean of its divisors is an integer number (79931735).

Almost surely, 2^641913057 is an apocalyptic number.

It is an amenable number.

641913057 is a deficient number, since it is larger than the sum of its proper divisors (317267763).

641913057 is a wasteful number, since it uses less digits than its factorization.

641913057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2459472 (or 2459469 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 641913057 is about 25336.0031772969. The cubic root of 641913057 is about 862.6316794541.

The spelling of 641913057 in words is "six hundred forty-one million, nine hundred thirteen thousand, fifty-seven".