128701617564 has 48 divisors (see below), whose sum is σ = 323560288800. Its totient is φ = 39581368320.

The previous prime is 128701617559. The next prime is 128701617601. The reversal of 128701617564 is 465716107821.

128701617564 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×128701617564² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

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, 126412 + ... + 522860.

It is an arithmetic number, because the mean of its divisors is an integer number (6740839350).

Almost surely, 2^128701617564 is an apocalyptic number.

It is an amenable number.

128701617564 is an abundant number, since it is smaller than the sum of its proper divisors (194858671236).

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

128701617564 is a wasteful number, since it uses less digits than its factorization.

128701617564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398550 (or 398548 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 48.

The spelling of 128701617564 in words is "one hundred twenty-eight billion, seven hundred one million, six hundred seventeen thousand, five hundred sixty-four".