1556574852872 has 36 divisors (see below), whose sum is σ = 3160446672285. Its totient is φ = 718397989920.

The previous prime is 1556574852853. The next prime is 1556574852947. The reversal of 1556574852872 is 2782584756551.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 1330917551716 + 225657301156 = 1153654^2 + 475034^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=882206.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1556574852799 and 1556574852808.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 45857747 + ... + 45891677.

Almost surely, 2^{1556574852872} is an apocalyptic number.

It is an amenable number.

1556574852872 is an abundant number, since it is smaller than the sum of its proper divisors (1603871819413).

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

1556574852872 is an frugal number, since it uses more digits than its factorization.

1556574852872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67894 (or 33946 counting only the distinct ones).

The product of its digits is 188160000, while the sum is 65.

The spelling of 1556574852872 in words is "one trillion, five hundred fifty-six billion, five hundred seventy-four million, eight hundred fifty-two thousand, eight hundred seventy-two".