2158422956 has 12 divisors (see below), whose sum is σ = 3833617368. Its totient is φ = 1063103712.

The previous prime is 2158422949. The next prime is 2158422961. The reversal of 2158422956 is 6592248512.

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, 4026641 + ... + 4027176.

It is an arithmetic number, because the mean of its divisors is an integer number (319468114).

Almost surely, 2^2158422956 is an apocalyptic number.

It is an amenable number.

2158422956 is a deficient number, since it is larger than the sum of its proper divisors (1675194412).

2158422956 is a wasteful number, since it uses less digits than its factorization.

2158422956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8053888 (or 8053886 counting only the distinct ones).

The product of its digits is 345600, while the sum is 44.

The square root of 2158422956 is about 46458.8307644521. The cubic root of 2158422956 is about 1292.3461412855.

The spelling of 2158422956 in words is "two billion, one hundred fifty-eight million, four hundred twenty-two thousand, nine hundred fifty-six".