64139806629 has 12 divisors (see below), whose sum is σ = 92651508300. Its totient is φ = 42757507584.

The previous prime is 64139806613. The next prime is 64139806721. The reversal of 64139806629 is 92660893146.

64139806629 is a `hidden beast` number, since 6 + 4 + 1 + 3 + 9 + 8 + 0 + 6 + 629 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 58853789604 + 5286017025 = 242598^2 + 72705^2 .

It is not a de Polignac number, because 64139806629 - 2⁴ = 64139806613 is a prime.

It is a super-2 number, since 2×64139806629² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64139806609) 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, 16374 + ... + 358535.

It is an arithmetic number, because the mean of its divisors is an integer number (7720959025).

Almost surely, 2^64139806629 is an apocalyptic number.

It is an amenable number.

64139806629 is a deficient number, since it is larger than the sum of its proper divisors (28511701671).

64139806629 is a wasteful number, since it uses less digits than its factorization.

64139806629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393924 (or 393921 counting only the distinct ones).

The product of its (nonzero) digits is 3359232, while the sum is 54.

The spelling of 64139806629 in words is "sixty-four billion, one hundred thirty-nine million, eight hundred six thousand, six hundred twenty-nine".