1555116444172 has 12 divisors (see below), whose sum is σ = 2737749908880. Its totient is φ = 772902184496.

The previous prime is 1555116444131. The next prime is 1555116444221. The reversal of 1555116444172 is 2714446115551.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1164008647 + ... + 1164009982.

It is an arithmetic number, because the mean of its divisors is an integer number (228145825740).

Almost surely, 2^{1555116444172} is an apocalyptic number.

It is an amenable number.

1555116444172 is a deficient number, since it is larger than the sum of its proper divisors (1182633464708).

1555116444172 is a wasteful number, since it uses less digits than its factorization.

1555116444172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2328018800 (or 2328018798 counting only the distinct ones).

The product of its digits is 672000, while the sum is 46.

The spelling of 1555116444172 in words is "one trillion, five hundred fifty-five billion, one hundred sixteen million, four hundred forty-four thousand, one hundred seventy-two".