2153844868 has 24 divisors (see below), whose sum is σ = 4311280512. Its totient is φ = 922306944.

The previous prime is 2153844827. The next prime is 2153844871. The reversal of 2153844868 is 8684483512.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2796 + ... + 65692.

It is an arithmetic number, because the mean of its divisors is an integer number (179636688).

Almost surely, 2^2153844868 is an apocalyptic number.

2153844868 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2153844868 is an abundant number, since it is smaller than the sum of its proper divisors (2157435644).

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

2153844868 is a wasteful number, since it uses less digits than its factorization.

2153844868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64131 (or 64129 counting only the distinct ones).

The product of its digits is 1474560, while the sum is 49.

The square root of 2153844868 is about 46409.5342359735. The cubic root of 2153844868 is about 1291.4317912512.

The spelling of 2153844868 in words is "two billion, one hundred fifty-three million, eight hundred forty-four thousand, eight hundred sixty-eight".