64659474432 has 576 divisors, whose sum is σ = 231815001600. Its totient is φ = 16939745280.

The previous prime is 64659474413. The next prime is 64659474457. The reversal of 64659474432 is 23447495646.

64659474432 is a `hidden beast` number, since 6 + 4 + 6 + 594 + 7 + 4 + 43 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (576).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 89929369 + ... + 89930087.

It is an arithmetic number, because the mean of its divisors is an integer number (402456600).

Almost surely, 2^64659474432 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 64659474432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115907500800).

64659474432 is an abundant number, since it is smaller than the sum of its proper divisors (167155527168).

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

64659474432 is a wasteful number, since it uses less digits than its factorization.

64659474432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 812 (or 789 counting only the distinct ones).

The product of its digits is 17418240, while the sum is 54.

The spelling of 64659474432 in words is "sixty-four billion, six hundred fifty-nine million, four hundred seventy-four thousand, four hundred thirty-two".