2155951215636 has 48 divisors (see below), whose sum is σ = 5063916204480. Its totient is φ = 713886600960.

The previous prime is 2155951215599. The next prime is 2155951215637. The reversal of 2155951215636 is 6365121595512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155951215637) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7164375 + ... + 7459233.

It is an arithmetic number, because the mean of its divisors is an integer number (105498254260).

Almost surely, 2^{2155951215636} is an apocalyptic number.

It is an amenable number.

2155951215636 is an abundant number, since it is smaller than the sum of its proper divisors (2907964988844).

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

2155951215636 is a wasteful number, since it uses less digits than its factorization.

2155951215636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298904 (or 298902 counting only the distinct ones).

The product of its digits is 2430000, while the sum is 51.

The spelling of 2155951215636 in words is "two trillion, one hundred fifty-five billion, nine hundred fifty-one million, two hundred fifteen thousand, six hundred thirty-six".