2156655384 has 96 divisors (see below), whose sum is σ = 6303351600. Its totient is φ = 662204160.

The previous prime is 2156655359. The next prime is 2156655407. The reversal of 2156655384 is 4835566512.

2156655384 is a `hidden beast` number, since 2 + 1 + 56 + 65 + 538 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 504247 + ... + 508505.

Almost surely, 2^2156655384 is an apocalyptic number.

2156655384 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2156655384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3151675800).

2156655384 is an abundant number, since it is smaller than the sum of its proper divisors (4146696216).

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

2156655384 is a wasteful number, since it uses less digits than its factorization.

2156655384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4825 (or 4818 counting only the distinct ones).

The product of its digits is 864000, while the sum is 45.

The square root of 2156655384 is about 46439.8038755549. The cubic root of 2156655384 is about 1291.9932696535.

The spelling of 2156655384 in words is "two billion, one hundred fifty-six million, six hundred fifty-five thousand, three hundred eighty-four".