2158182768 has 80 divisors (see below), whose sum is σ = 6544025600. Its totient is φ = 599954688.

The previous prime is 2158182757. The next prime is 2158182787. The reversal of 2158182768 is 8672818512.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74368 + ... + 99231.

It is an arithmetic number, because the mean of its divisors is an integer number (81800320).

Almost surely, 2^2158182768 is an apocalyptic number.

2158182768 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2158182768 is an abundant number, since it is smaller than the sum of its proper divisors (4385842832).

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

2158182768 is a wasteful number, since it uses less digits than its factorization.

2158182768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173654 (or 173648 counting only the distinct ones).

The product of its digits is 430080, while the sum is 48.

The square root of 2158182768 is about 46456.2457372526. The cubic root of 2158182768 is about 1292.2982023418.

The spelling of 2158182768 in words is "two billion, one hundred fifty-eight million, one hundred eighty-two thousand, seven hundred sixty-eight".