2136647680 has 48 divisors (see below), whose sum is σ = 5126727060. Its totient is φ = 854654976.

The previous prime is 2136647657. The next prime is 2136647687. The reversal of 2136647680 is 867466312.

It can be written as a sum of positive squares in 2 ways, for example, as 2096907264 + 39740416 = 45792^2 + 6304^2 .

It is not an unprimeable number, because it can be changed into a prime (2136647687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94089 + ... + 114568.

Almost surely, 2^2136647680 is an apocalyptic number.

2136647680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2136647680 is an abundant number, since it is smaller than the sum of its proper divisors (2990079380).

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

2136647680 is an equidigital number, since it uses as much as digits as its factorization.

2136647680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208684 (or 208664 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 43.

The square root of 2136647680 is about 46223.8864657657. The cubic root of 2136647680 is about 1287.9854942234.

The spelling of 2136647680 in words is "two billion, one hundred thirty-six million, six hundred forty-seven thousand, six hundred eighty".