2156325015618 has 48 divisors (see below), whose sum is σ = 4726680791040. Its totient is φ = 710375696448.

The previous prime is 2156325015569. The next prime is 2156325015623. The reversal of 2156325015618 is 8165105236512.

2156325015618 is a `hidden beast` number, since 2 + 1 + 5 + 6 + 3 + 25 + 0 + 1 + 5 + 618 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3230671 + ... + 3840557.

It is an arithmetic number, because the mean of its divisors is an integer number (98472516480).

Almost surely, 2^{2156325015618} is an apocalyptic number.

2156325015618 is an abundant number, since it is smaller than the sum of its proper divisors (2570355775422).

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

2156325015618 is a wasteful number, since it uses less digits than its factorization.

2156325015618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612191 (or 612188 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 45.

The spelling of 2156325015618 in words is "two trillion, one hundred fifty-six billion, three hundred twenty-five million, fifteen thousand, six hundred eighteen".