64740521328 has 40 divisors (see below), whose sum is σ = 191138683008. Its totient is φ = 18497291712.

The previous prime is 64740521311. The next prime is 64740521341. The reversal of 64740521328 is 82312504746.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 64740521328.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96339726 + ... + 96340397.

Almost surely, 2^64740521328 is an apocalyptic number.

It is an amenable number.

64740521328 is an abundant number, since it is smaller than the sum of its proper divisors (126398161680).

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

64740521328 is a wasteful number, since it uses less digits than its factorization.

64740521328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192680141 (or 192680135 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 42.

The spelling of 64740521328 in words is "sixty-four billion, seven hundred forty million, five hundred twenty-one thousand, three hundred twenty-eight".