128625555815 has 8 divisors (see below), whose sum is σ = 155716602768. Its totient is φ = 101989820800.

The previous prime is 128625555769. The next prime is 128625555827. The reversal of 128625555815 is 518555526821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 128625555815 - 2¹⁴ = 128625539431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113827361 + ... + 113828490.

It is an arithmetic number, because the mean of its divisors is an integer number (19464575346).

Almost surely, 2^128625555815 is an apocalyptic number.

128625555815 is a deficient number, since it is larger than the sum of its proper divisors (27091046953).

128625555815 is a wasteful number, since it uses less digits than its factorization.

128625555815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227655969.

The product of its digits is 4800000, while the sum is 53.

The spelling of 128625555815 in words is "one hundred twenty-eight billion, six hundred twenty-five million, five hundred fifty-five thousand, eight hundred fifteen".