2872161855 has 32 divisors (see below), whose sum is σ = 5109995520. Its totient is φ = 1530640800.

The previous prime is 2872161833. The next prime is 2872161871. The reversal of 2872161855 is 5581612782.

2872161855 is a `hidden beast` number, since 2 + 8 + 7 + 21 + 618 + 5 + 5 = 666.

It is not a de Polignac number, because 2872161855 - 2⁸ = 2872161599 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 2872161855.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 184630 + ... + 199580.

It is an arithmetic number, because the mean of its divisors is an integer number (159687360).

Almost surely, 2^2872161855 is an apocalyptic number.

2872161855 is a deficient number, since it is larger than the sum of its proper divisors (2237833665).

2872161855 is a wasteful number, since it uses less digits than its factorization.

2872161855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16388 (or 16382 counting only the distinct ones).

The product of its digits is 268800, while the sum is 45.

The square root of 2872161855 is about 53592.5541003599. The cubic root of 2872161855 is about 1421.4654340270.

The spelling of 2872161855 in words is "two billion, eight hundred seventy-two million, one hundred sixty-one thousand, eight hundred fifty-five".