2156899384 has 16 divisors (see below), whose sum is σ = 4046265720. Its totient is φ = 1077895200.

The previous prime is 2156899373. The next prime is 2156899387. The reversal of 2156899384 is 4839986512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156899387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52542 + ... + 84109.

Almost surely, 2^2156899384 is an apocalyptic number.

It is an amenable number.

2156899384 is a deficient number, since it is larger than the sum of its proper divisors (1889366336).

2156899384 is a wasteful number, since it uses less digits than its factorization.

2156899384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138630 (or 138626 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 55.

The square root of 2156899384 is about 46442.4308579988. The cubic root of 2156899384 is about 1292.0419923921.

The spelling of 2156899384 in words is "two billion, one hundred fifty-six million, eight hundred ninety-nine thousand, three hundred eighty-four".