641138615757 has 48 divisors (see below), whose sum is σ = 1000701479232. Its totient is φ = 394088302080.

The previous prime is 641138615743. The next prime is 641138615759. The reversal of 641138615757 is 757516831146.

641138615757 is a `hidden beast` number, since 6 + 4 + 1 + 1 + 3 + 8 + 61 + 575 + 7 = 666.

It is not a de Polignac number, because 641138615757 - 2⁶ = 641138615693 is a prime.

It is a super-2 number, since 2×641138615757² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641138615759) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1682658 + ... + 2028204.

It is an arithmetic number, because the mean of its divisors is an integer number (20847947484).

Almost surely, 2^641138615757 is an apocalyptic number.

641138615757 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

It is an amenable number.

641138615757 is a deficient number, since it is larger than the sum of its proper divisors (359562863475).

641138615757 is a wasteful number, since it uses less digits than its factorization.

641138615757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345818 (or 345815 counting only the distinct ones).

The product of its digits is 4233600, while the sum is 54.

The spelling of 641138615757 in words is "six hundred forty-one billion, one hundred thirty-eight million, six hundred fifteen thousand, seven hundred fifty-seven".