2158820676 has 144 divisors (see below), whose sum is σ = 5740134400. Its totient is φ = 683557056.

The previous prime is 2158820669. The next prime is 2158820681. The reversal of 2158820676 is 6760288512.

2158820676 is a `hidden beast` number, since 2 + 1 + 588 + 2 + 0 + 67 + 6 = 666.

It is a super-2 number, since 2×2158820676² = 9321013422250193952, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15531015 + ... + 15531153.

Almost surely, 2^2158820676 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2158820676, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2870067200).

2158820676 is an abundant number, since it is smaller than the sum of its proper divisors (3581313724).

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

2158820676 is a wasteful number, since it uses less digits than its factorization.

2158820676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398 (or 393 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The square root of 2158820676 is about 46463.1109160805. The cubic root of 2158820676 is about 1292.4255141040.

The spelling of 2158820676 in words is "two billion, one hundred fifty-eight million, eight hundred twenty thousand, six hundred seventy-six".