128887944423600 has 120 divisors (see below), whose sum is σ = 413824563119632. Its totient is φ = 34290741657600.

The previous prime is 128887944423571. The next prime is 128887944423767. The reversal of 128887944423600 is 6324449788821.

It is a tau number, because it is divible by the number of its divisors (120).

It is a super-2 number, since 2×128887944423600² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 123506521 + ... + 124545720.

Almost surely, 2^{128887944423600} is an apocalyptic number.

128887944423600 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128887944423600 is an abundant number, since it is smaller than the sum of its proper divisors (284936618696032).

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

128887944423600 is a wasteful number, since it uses less digits than its factorization.

128887944423600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248052695 (or 248052684 counting only the distinct ones).

The product of its (nonzero) digits is 148635648, while the sum is 66.

The spelling of 128887944423600 in words is "one hundred twenty-eight trillion, eight hundred eighty-seven billion, nine hundred forty-four million, four hundred twenty-three thousand, six hundred".