128115602600 has 48 divisors (see below), whose sum is σ = 308140127100. Its totient is φ = 49479127040.

The previous prime is 128115602581. The next prime is 128115602627. The reversal of 128115602600 is 6206511821.

It can be written as a sum of positive squares in 6 ways, for example, as 91613971684 + 36501630916 = 302678^2 + 191054^2 .

It is a super-2 number, since 2×128115602600² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11038649 + ... + 11050248.

Almost surely, 2^128115602600 is an apocalyptic number.

128115602600 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128115602600 is an abundant number, since it is smaller than the sum of its proper divisors (180024524500).

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

128115602600 is a wasteful number, since it uses less digits than its factorization.

128115602600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22088942 (or 22088933 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 32.

The spelling of 128115602600 in words is "one hundred twenty-eight billion, one hundred fifteen million, six hundred two thousand, six hundred".