2156316444656 has 40 divisors (see below), whose sum is σ = 4668831519408. Its totient is φ = 956237888000.

The previous prime is 2156316444649. The next prime is 2156316444679. The reversal of 2156316444656 is 6564446136512.

It is a junction number, because it is equal to n+sod(n) for n = 2156316444598 and 2156316444607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149404955 + ... + 149419386.

Almost surely, 2^{2156316444656} is an apocalyptic number.

It is an amenable number.

2156316444656 is an abundant number, since it is smaller than the sum of its proper divisors (2512515074752).

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

2156316444656 is a wasteful number, since it uses less digits than its factorization.

2156316444656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298824401 (or 298824395 counting only the distinct ones).

The product of its digits is 12441600, while the sum is 53.

The spelling of 2156316444656 in words is "two trillion, one hundred fifty-six billion, three hundred sixteen million, four hundred forty-four thousand, six hundred fifty-six".