2154857556 has 12 divisors (see below), whose sum is σ = 5028000992. Its totient is φ = 718285848.

The previous prime is 2154857527. The next prime is 2154857561. The reversal of 2154857556 is 6557584512.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×2154857556² = 9286822173300586272, which contains 22 as substring.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89785720 + ... + 89785743.

Almost surely, 2^2154857556 is an apocalyptic number.

It is an amenable number.

2154857556 is an abundant number, since it is smaller than the sum of its proper divisors (2873143436).

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

2154857556 is a wasteful number, since it uses less digits than its factorization.

2154857556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179571470 (or 179571468 counting only the distinct ones).

The product of its digits is 1680000, while the sum is 48.

The square root of 2154857556 is about 46420.4432981849. The cubic root of 2154857556 is about 1291.6341599829.

The spelling of 2154857556 in words is "two billion, one hundred fifty-four million, eight hundred fifty-seven thousand, five hundred fifty-six".