125297702091 has 20 divisors (see below), whose sum is σ = 187183566504. Its totient is φ = 83527135200.

The previous prime is 125297702083. The next prime is 125297702137. The reversal of 125297702091 is 190207792521.

125297702091 is a `hidden beast` number, since 12 + 529 + 7 + 7 + 0 + 20 + 91 = 666.

It is not a de Polignac number, because 125297702091 - 2³ = 125297702083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125297702591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2020456 + ... + 2081546.

Almost surely, 2^125297702091 is an apocalyptic number.

125297702091 is a deficient number, since it is larger than the sum of its proper divisors (61885864413).

125297702091 is an equidigital number, since it uses as much as digits as its factorization.

125297702091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86424 (or 86415 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 45.

The spelling of 125297702091 in words is "one hundred twenty-five billion, two hundred ninety-seven million, seven hundred two thousand, ninety-one".