2166360653440 has 96 divisors (see below), whose sum is σ = 5465879286660. Its totient is φ = 820936581120.

The previous prime is 2166360653399. The next prime is 2166360653441. The reversal of 2166360653440 is 443560636612.

It can be written as a sum of positive squares in 2 ways, for example, as 2159089339456 + 7271313984 = 1469384^2 + 85272^2 .

It is not an unprimeable number, because it can be changed into a prime (2166360653441) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4457241 + ... + 4919320.

Almost surely, 2^{2166360653440} is an apocalyptic number.

2166360653440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2166360653440 is an abundant number, since it is smaller than the sum of its proper divisors (3299518633220).

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

2166360653440 is an equidigital number, since it uses as much as digits as its factorization.

2166360653440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9376618 (or 9376587 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 46.

The spelling of 2166360653440 in words is "two trillion, one hundred sixty-six billion, three hundred sixty million, six hundred fifty-three thousand, four hundred forty".