64129976911 has 72 divisors (see below), whose sum is σ = 93309717744. Its totient is φ = 43413027840.

The previous prime is 64129976863. The next prime is 64129976927. The reversal of 64129976911 is 11967992146.

It is not a de Polignac number, because 64129976911 - 2³¹ = 61982493263 is a prime.

It is a super-2 number, since 2×64129976911² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64129976411) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1527841 + ... + 1569253.

It is an arithmetic number, because the mean of its divisors is an integer number (1295968302).

Almost surely, 2^64129976911 is an apocalyptic number.

64129976911 is a deficient number, since it is larger than the sum of its proper divisors (29179740833).

64129976911 is a wasteful number, since it uses less digits than its factorization.

64129976911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41481 (or 41461 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 55.

The spelling of 64129976911 in words is "sixty-four billion, one hundred twenty-nine million, nine hundred seventy-six thousand, nine hundred eleven".