2156318080 has 256 divisors, whose sum is σ = 6514421760. Its totient is φ = 665026560.

The previous prime is 2156318071. The next prime is 2156318161. The reversal of 2156318080 is 808136512.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1751065 + ... + 1752295.

It is an arithmetic number, because the mean of its divisors is an integer number (25446960).

Almost surely, 2^2156318080 is an apocalyptic number.

2156318080 is a gapful number since it is divisible by the number (20) 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 2156318080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3257210880).

2156318080 is an abundant number, since it is smaller than the sum of its proper divisors (4358103680).

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

2156318080 is a wasteful number, since it uses less digits than its factorization.

2156318080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1297 (or 1285 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 2156318080 is about 46436.1721075284. The cubic root of 2156318080 is about 1291.9259096072.

The spelling of 2156318080 in words is "two billion, one hundred fifty-six million, three hundred eighteen thousand, eighty".