64968156432 has 80 divisors (see below), whose sum is σ = 186533328960. Its totient is φ = 21650169600.

The previous prime is 64968156427. The next prime is 64968156443. The reversal of 64968156432 is 23465186946.

64968156432 is a `hidden beast` number, since 6 + 49 + 6 + 8 + 1 + 564 + 32 = 666.

It is a super-2 number, since 2×64968156432² (a number of 22 digits) contains 22 as substring.

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

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1748932 + ... + 1785692.

It is an arithmetic number, because the mean of its divisors is an integer number (2331666612).

Almost surely, 2^64968156432 is an apocalyptic number.

It is an amenable number.

64968156432 is an abundant number, since it is smaller than the sum of its proper divisors (121565172528).

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

64968156432 is a wasteful number, since it uses less digits than its factorization.

64968156432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40869 (or 40857 counting only the distinct ones).

The product of its digits is 7464960, while the sum is 54.

The spelling of 64968156432 in words is "sixty-four billion, nine hundred sixty-eight million, one hundred fifty-six thousand, four hundred thirty-two".