1523957021425 has 12 divisors (see below), whose sum is σ = 1890770186956. Its totient is φ = 1218479500800.

The previous prime is 1523957021381. The next prime is 1523957021473. The reversal of 1523957021425 is 5241207593251.

It can be written as a sum of positive squares in 6 ways, for example, as 85149574416 + 1438807447009 = 291804^2 + 1199503^2 .

It is not a de Polignac number, because 1523957021425 - 2⁷ = 1523957021297 is a prime.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 17107596 + ... + 17196445.

Almost surely, 2^{1523957021425} is an apocalyptic number.

It is an amenable number.

1523957021425 is a deficient number, since it is larger than the sum of its proper divisors (366813165531).

1523957021425 is a wasteful number, since it uses less digits than its factorization.

1523957021425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34305828 (or 34305823 counting only the distinct ones).

The product of its (nonzero) digits is 756000, while the sum is 46.

The spelling of 1523957021425 in words is "one trillion, five hundred twenty-three billion, nine hundred fifty-seven million, twenty-one thousand, four hundred twenty-five".