125507557553 has 8 divisors (see below), whose sum is σ = 143760998208. Its totient is φ = 107335064304.

The previous prime is 125507557531. The next prime is 125507557607. The reversal of 125507557553 is 355755705521.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 125507557553 - 2²⁰ = 125506508977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125507557453) 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 7 ways as a sum of consecutive naturals, for example, 20233526 + ... + 20239727.

It is an arithmetic number, because the mean of its divisors is an integer number (17970124776).

Almost surely, 2^125507557553 is an apocalyptic number.

It is an amenable number.

125507557553 is a deficient number, since it is larger than the sum of its proper divisors (18253440655).

125507557553 is an equidigital number, since it uses as much as digits as its factorization.

125507557553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40473703.

The product of its (nonzero) digits is 4593750, while the sum is 50.

The spelling of 125507557553 in words is "one hundred twenty-five billion, five hundred seven million, five hundred fifty-seven thousand, five hundred fifty-three".