128615504612 has 12 divisors (see below), whose sum is σ = 257231009280. Its totient is φ = 55120930536.

The previous prime is 128615504593. The next prime is 128615504617. The reversal of 128615504612 is 216405516821.

128615504612 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 128615504612.

It is not an unprimeable number, because it can be changed into a prime (128615504617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2296705412 + ... + 2296705467.

It is an arithmetic number, because the mean of its divisors is an integer number (21435917440).

Almost surely, 2^128615504612 is an apocalyptic number.

It is an amenable number.

128615504612 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

128615504612 is a wasteful number, since it uses less digits than its factorization.

128615504612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4593410890 (or 4593410888 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 41.

The spelling of 128615504612 in words is "one hundred twenty-eight billion, six hundred fifteen million, five hundred four thousand, six hundred twelve".