64937951232 has 512 divisors, whose sum is σ = 225884989440. Its totient is φ = 16090398720.

The previous prime is 64937951171. The next prime is 64937951261. The reversal of 64937951232 is 23215973946.

It is a tau number, because it is divible by the number of its divisors (512).

It is a super-2 number, since 2×64937951232² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 174096198 + ... + 174096570.

It is an arithmetic number, because the mean of its divisors is an integer number (441181620).

Almost surely, 2^64937951232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64937951232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112942494720).

64937951232 is an abundant number, since it is smaller than the sum of its proper divisors (160947038208).

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

64937951232 is a wasteful number, since it uses less digits than its factorization.

64937951232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447 (or 419 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 51.

The spelling of 64937951232 in words is "sixty-four billion, nine hundred thirty-seven million, nine hundred fifty-one thousand, two hundred thirty-two".