2156656550364 has 48 divisors (see below), whose sum is σ = 5628857556000. Its totient is φ = 714060776448.

The previous prime is 2156656550339. The next prime is 2156656550393. The reversal of 2156656550364 is 4630556566512.

2156656550364 is a `hidden beast` number, since 2 + 1 + 5 + 6 + 6 + 56 + 550 + 36 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 2156656550364.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66994117 + ... + 67026300.

It is an arithmetic number, because the mean of its divisors is an integer number (117267865750).

Almost surely, 2^{2156656550364} is an apocalyptic number.

It is an amenable number.

2156656550364 is an abundant number, since it is smaller than the sum of its proper divisors (3472201005636).

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

2156656550364 is a wasteful number, since it uses less digits than its factorization.

2156656550364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134020579 (or 134020571 counting only the distinct ones).

The product of its (nonzero) digits is 19440000, while the sum is 54.

The spelling of 2156656550364 in words is "two trillion, one hundred fifty-six billion, six hundred fifty-six million, five hundred fifty thousand, three hundred sixty-four".