64129976910 has 112 divisors (see below), whose sum is σ = 173191795920. Its totient is φ = 17089470720.

The previous prime is 64129976863. The next prime is 64129976927. The reversal of 64129976910 is 1967992146.

It is a happy number.

It is a super-2 number, since 2×64129976910² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 17049430 + ... + 17053190.

Almost surely, 2^64129976910 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64129976910, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86595897960).

64129976910 is an abundant number, since it is smaller than the sum of its proper divisors (109061819010).

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

64129976910 is a wasteful number, since it uses less digits than its factorization.

64129976910 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6125 (or 6110 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 54.

The spelling of 64129976910 in words is "sixty-four billion, one hundred twenty-nine million, nine hundred seventy-six thousand, nine hundred ten".