2154502656 has 60 divisors (see below), whose sum is σ = 6218053842. Its totient is φ = 718166016.

The previous prime is 2154502631. The next prime is 2154502657. The reversal of 2154502656 is 6562054512.

It can be written as a sum of positive squares in only one way, i.e., 2154445056 + 57600 = 46416^2 + 240^2 .

It is a super-2 number, since 2×2154502656² = 9283763389422108672, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 2154502656.

It is not an unprimeable number, because it can be changed into a prime (2154502657) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 229171 + ... + 238386.

Almost surely, 2^2154502656 is an apocalyptic number.

It is an amenable number.

2154502656 is an abundant number, since it is smaller than the sum of its proper divisors (4063551186).

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

2154502656 is an equidigital number, since it uses as much as digits as its factorization.

2154502656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467581 (or 467562 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The square root of 2154502656 is about 46416.6204715509. The cubic root of 2154502656 is about 1291.5632463812.

The spelling of 2154502656 in words is "two billion, one hundred fifty-four million, five hundred two thousand, six hundred fifty-six".