2156383868 has 12 divisors (see below), whose sum is σ = 3774568392. Its totient is φ = 1077935760.

The previous prime is 2156383847. The next prime is 2156383871. The reversal of 2156383868 is 8683836512.

It is a congruent number.

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, 44438 + ... + 79293.

It is an arithmetic number, because the mean of its divisors is an integer number (314547366).

Almost surely, 2^2156383868 is an apocalyptic number.

It is an amenable number.

2156383868 is a deficient number, since it is larger than the sum of its proper divisors (1618184524).

2156383868 is a wasteful number, since it uses less digits than its factorization.

2156383868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128092 (or 128090 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 50.

The square root of 2156383868 is about 46436.8804723142. The cubic root of 2156383868 is about 1291.9390481075.

The spelling of 2156383868 in words is "two billion, one hundred fifty-six million, three hundred eighty-three thousand, eight hundred sixty-eight".