2155951215594 has 40 divisors (see below), whose sum is σ = 5270102975808. Its totient is φ = 653318549640.

The previous prime is 2155951215581. The next prime is 2155951215599. The reversal of 2155951215594 is 4955121595512.

2155951215594 is a `hidden beast` number, since 2 + 15 + 5 + 9 + 51 + 21 + 559 + 4 = 666.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

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 2155951215594.

It is not an unprimeable number, because it can be changed into a prime (2155951215599) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 604922802 + ... + 604926365.

Almost surely, 2^{2155951215594} is an apocalyptic number.

2155951215594 is an abundant number, since it is smaller than the sum of its proper divisors (3114151760214).

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

2155951215594 is a wasteful number, since it uses less digits than its factorization.

2155951215594 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1209849192 (or 1209849183 counting only the distinct ones).

The product of its digits is 4050000, while the sum is 54.

The spelling of 2155951215594 in words is "two trillion, one hundred fifty-five billion, nine hundred fifty-one million, two hundred fifteen thousand, five hundred ninety-four".