1625251451556 has 24 divisors (see below), whose sum is σ = 3793301940960. Its totient is φ = 541600690432.

The previous prime is 1625251451543. The next prime is 1625251451567. The reversal of 1625251451556 is 6551541525261.

It is a super-2 number, since 2×1625251451556² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18678966 + ... + 18765773.

It is an arithmetic number, because the mean of its divisors is an integer number (158054247540).

Almost surely, 2^{1625251451556} is an apocalyptic number.

It is an amenable number.

1625251451556 is an abundant number, since it is smaller than the sum of its proper divisors (2168050489404).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1625251451556 is a wasteful number, since it uses less digits than its factorization.

1625251451556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37448363 (or 37448361 counting only the distinct ones).

The product of its digits is 1800000, while the sum is 48.

The spelling of 1625251451556 in words is "one trillion, six hundred twenty-five billion, two hundred fifty-one million, four hundred fifty-one thousand, five hundred fifty-six".