125663856915 has 8 divisors (see below), whose sum is σ = 201062171088. Its totient is φ = 67020723680.

The previous prime is 125663856859. The next prime is 125663856937. The reversal of 125663856915 is 519658366521.

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

It is not a de Polignac number, because 125663856915 - 2¹⁴ = 125663840531 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4188795216 + ... + 4188795245.

It is an arithmetic number, because the mean of its divisors is an integer number (25132771386).

Almost surely, 2^125663856915 is an apocalyptic number.

125663856915 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

125663856915 is a deficient number, since it is larger than the sum of its proper divisors (75398314173).

125663856915 is an equidigital number, since it uses as much as digits as its factorization.

125663856915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8377590469.

The product of its digits is 11664000, while the sum is 57.

The spelling of 125663856915 in words is "one hundred twenty-five billion, six hundred sixty-three million, eight hundred fifty-six thousand, nine hundred fifteen".