125657173527 has 4 divisors (see below), whose sum is σ = 167542898040. Its totient is φ = 83771449016.

The previous prime is 125657173483. The next prime is 125657173559. The reversal of 125657173527 is 725371756521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 125657173527 - 2¹⁰ = 125657172503 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 125657173527.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125657173597) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20942862252 + ... + 20942862257.

It is an arithmetic number, because the mean of its divisors is an integer number (41885724510).

Almost surely, 2^125657173527 is an apocalyptic number.

125657173527 is a deficient number, since it is larger than the sum of its proper divisors (41885724513).

125657173527 is an equidigital number, since it uses as much as digits as its factorization.

125657173527 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41885724512.

The product of its digits is 3087000, while the sum is 51.

The spelling of 125657173527 in words is "one hundred twenty-five billion, six hundred fifty-seven million, one hundred seventy-three thousand, five hundred twenty-seven".