128233720264 has 16 divisors (see below), whose sum is σ = 258933473820. Its totient is φ = 59184793920.

The previous prime is 128233720259. The next prime is 128233720331. The reversal of 128233720264 is 462027332821.

It can be written as a sum of positive squares in 2 ways, for example, as 107485622500 + 20748097764 = 327850^2 + 144042^2 .

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, 616508167 + ... + 616508374.

Almost surely, 2^128233720264 is an apocalyptic number.

It is an amenable number.

128233720264 is an abundant number, since it is smaller than the sum of its proper divisors (130699753556).

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

128233720264 is a wasteful number, since it uses less digits than its factorization.

128233720264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1233016560 (or 1233016556 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 40.

The spelling of 128233720264 in words is "one hundred twenty-eight billion, two hundred thirty-three million, seven hundred twenty thousand, two hundred sixty-four".