2158964868 has 48 divisors (see below), whose sum is σ = 5209473024. Its totient is φ = 695183520.

The previous prime is 2158964867. The next prime is 2158964879. The reversal of 2158964868 is 8684698512.

It is a happy number.

It is a super-2 number, since 2×2158964868² = 9322258602516514848, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2158964867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 213421 + ... + 223307.

It is an arithmetic number, because the mean of its divisors is an integer number (108530688).

Almost surely, 2^2158964868 is an apocalyptic number.

It is an amenable number.

2158964868 is an abundant number, since it is smaller than the sum of its proper divisors (3050508156).

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

2158964868 is a wasteful number, since it uses less digits than its factorization.

2158964868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10512 (or 10510 counting only the distinct ones).

The product of its digits is 6635520, while the sum is 57.

The square root of 2158964868 is about 46464.6625727552. The cubic root of 2158964868 is about 1292.4542880348.

The spelling of 2158964868 in words is "two billion, one hundred fifty-eight million, nine hundred sixty-four thousand, eight hundred sixty-eight".