2156122636 has 12 divisors (see below), whose sum is σ = 3774283128. Its totient is φ = 1077756032.

The previous prime is 2156122543. The next prime is 2156122667. The reversal of 2156122636 is 6362216512.

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, 60046 + ... + 88981.

It is an arithmetic number, because the mean of its divisors is an integer number (314523594).

Almost surely, 2^2156122636 is an apocalyptic number.

It is an amenable number.

2156122636 is a deficient number, since it is larger than the sum of its proper divisors (1618160492).

2156122636 is a wasteful number, since it uses less digits than its factorization.

2156122636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152648 (or 152646 counting only the distinct ones).

The product of its digits is 25920, while the sum is 34.

The square root of 2156122636 is about 46434.0676228133. The cubic root of 2156122636 is about 1291.8868759725.

The spelling of 2156122636 in words is "two billion, one hundred fifty-six million, one hundred twenty-two thousand, six hundred thirty-six".