125125663665 has 32 divisors (see below), whose sum is σ = 205091415936. Its totient is φ = 65107123200.

The previous prime is 125125663609. The next prime is 125125663679. The reversal of 125125663665 is 566366521521.

It is not a de Polignac number, because 125125663665 - 2¹⁵ = 125125630897 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 455065 + ... + 676265.

It is an arithmetic number, because the mean of its divisors is an integer number (6409106748).

Almost surely, 2^125125663665 is an apocalyptic number.

125125663665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

125125663665 is a deficient number, since it is larger than the sum of its proper divisors (79965752271).

125125663665 is a wasteful number, since it uses less digits than its factorization.

125125663665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222129.

The product of its digits is 1944000, while the sum is 48.

The spelling of 125125663665 in words is "one hundred twenty-five billion, one hundred twenty-five million, six hundred sixty-three thousand, six hundred sixty-five".