1556407242125 has 32 divisors (see below), whose sum is σ = 1947401834976. Its totient is φ = 1241919283200.

The previous prime is 1556407242119. The next prime is 1556407242199. The reversal of 1556407242125 is 5212427046551.

It can be written as a sum of positive squares in 16 ways, for example, as 589917699721 + 966489542404 = 768061^2 + 983102^2 .

It is not a de Polignac number, because 1556407242125 - 2⁸ = 1556407241869 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 254603069 + ... + 254609181.

It is an arithmetic number, because the mean of its divisors is an integer number (60856307343).

Almost surely, 2^{1556407242125} is an apocalyptic number.

It is an amenable number.

1556407242125 is a deficient number, since it is larger than the sum of its proper divisors (390994592851).

1556407242125 is an equidigital number, since it uses as much as digits as its factorization.

1556407242125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11042 (or 11032 counting only the distinct ones).

The product of its (nonzero) digits is 672000, while the sum is 44.

The spelling of 1556407242125 in words is "one trillion, five hundred fifty-six billion, four hundred seven million, two hundred forty-two thousand, one hundred twenty-five".