128013017236 has 12 divisors (see below), whose sum is σ = 241255301812. Its totient is φ = 59082931008.

The previous prime is 128013017227. The next prime is 128013017291. The reversal of 128013017236 is 632710310821.

It can be written as a sum of positive squares in 2 ways, for example, as 23097920400 + 104915096836 = 151980^2 + 323906^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1230894345 + ... + 1230894448.

Almost surely, 2^128013017236 is an apocalyptic number.

It is an amenable number.

128013017236 is a deficient number, since it is larger than the sum of its proper divisors (113242284576).

128013017236 is a wasteful number, since it uses less digits than its factorization.

128013017236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2461788810 (or 2461788808 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 34.

The spelling of 128013017236 in words is "one hundred twenty-eight billion, thirteen million, seventeen thousand, two hundred thirty-six".