125953564491 has 8 divisors (see below), whose sum is σ = 186597873360. Its totient is φ = 83969042976.

The previous prime is 125953564463. The next prime is 125953564511. The reversal of 125953564491 is 194465359521.

It is a happy number.

125953564491 is a `hidden beast` number, since 1 + 2 + 5 + 9 + 535 + 64 + 49 + 1 = 666.

It is not a de Polignac number, because 125953564491 - 2¹⁰ = 125953563467 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125953564441) by changing a digit.

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, 2332473390 + ... + 2332473443.

It is an arithmetic number, because the mean of its divisors is an integer number (23324734170).

Almost surely, 2^125953564491 is an apocalyptic number.

125953564491 is a deficient number, since it is larger than the sum of its proper divisors (60644308869).

125953564491 is an equidigital number, since it uses as much as digits as its factorization.

125953564491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4664946842 (or 4664946836 counting only the distinct ones).

The product of its digits is 5832000, while the sum is 54.

The spelling of 125953564491 in words is "one hundred twenty-five billion, nine hundred fifty-three million, five hundred sixty-four thousand, four hundred ninety-one".