2156217110044 has 6 divisors (see below), whose sum is σ = 3773379942584. Its totient is φ = 1078108555020.

The previous prime is 2156217110039. The next prime is 2156217110101. The reversal of 2156217110044 is 4400117126512.

It is a junction number, because it is equal to n+sod(n) for n = 2156217109991 and 2156217110009.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 269527138752 + ... + 269527138759.

Almost surely, 2^{2156217110044} is an apocalyptic number.

It is an amenable number.

2156217110044 is a deficient number, since it is larger than the sum of its proper divisors (1617162832540).

2156217110044 is a wasteful number, since it uses less digits than its factorization.

2156217110044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539054277515 (or 539054277513 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 34.

The spelling of 2156217110044 in words is "two trillion, one hundred fifty-six billion, two hundred seventeen million, one hundred ten thousand, forty-four".