2155436233656 has 32 divisors (see below), whose sum is σ = 5422912826640. Its totient is φ = 713902445568.

The previous prime is 2155436233637. The next prime is 2155436233661. The reversal of 2155436233656 is 6563326345512.

It is a junction number, because it is equal to n+sod(n) for n = 2155436233599 and 2155436233608.

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, 286014841 + ... + 286022376.

Almost surely, 2^{2155436233656} is an apocalyptic number.

It is an amenable number.

2155436233656 is an abundant number, since it is smaller than the sum of its proper divisors (3267476592984).

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

2155436233656 is a wasteful number, since it uses less digits than its factorization.

2155436233656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572037383 (or 572037379 counting only the distinct ones).

The product of its digits is 11664000, while the sum is 51.

The spelling of 2155436233656 in words is "two trillion, one hundred fifty-five billion, four hundred thirty-six million, two hundred thirty-three thousand, six hundred fifty-six".