2156647584 has 144 divisors (see below), whose sum is σ = 7092253728. Its totient is φ = 568770048.

The previous prime is 2156647567. The next prime is 2156647607. The reversal of 2156647584 is 4857466512.

It is a super-2 number, since 2×2156647584² = 9302257603146074112, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43519 + ... + 78785.

It is an arithmetic number, because the mean of its divisors is an integer number (49251762).

Almost surely, 2^2156647584 is an apocalyptic number.

2156647584 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 2156647584, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3546126864).

2156647584 is an abundant number, since it is smaller than the sum of its proper divisors (4935606144).

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

2156647584 is a wasteful number, since it uses less digits than its factorization.

2156647584 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35307 (or 35292 counting only the distinct ones).

The product of its digits is 1612800, while the sum is 48.

The square root of 2156647584 is about 46439.7198957961. The cubic root of 2156647584 is about 1291.9917120627.

The spelling of 2156647584 in words is "two billion, one hundred fifty-six million, six hundred forty-seven thousand, five hundred eighty-four".