128688290431625 has 16 divisors (see below), whose sum is σ = 160603489507968. Its totient is φ = 102950309878000.

The previous prime is 128688290431513. The next prime is 128688290431633. The reversal of 128688290431625 is 526134092886821.

It is a happy number.

It is not a de Polignac number, because 128688290431625 - 2²² = 128688286237321 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43478684 + ... + 46344066.

It is an arithmetic number, because the mean of its divisors is an integer number (10037718094248).

Almost surely, 2^{128688290431625} is an apocalyptic number.

It is an amenable number.

128688290431625 is a deficient number, since it is larger than the sum of its proper divisors (31915199076343).

128688290431625 is an equidigital number, since it uses as much as digits as its factorization.

128688290431625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3224689 (or 3224679 counting only the distinct ones).

The product of its (nonzero) digits is 79626240, while the sum is 65.

The spelling of 128688290431625 in words is "one hundred twenty-eight trillion, six hundred eighty-eight billion, two hundred ninety million, four hundred thirty-one thousand, six hundred twenty-five".