2164640343780 has 24 divisors (see below), whose sum is σ = 6060992962752. Its totient is φ = 577237424992.

The previous prime is 2164640343763. The next prime is 2164640343829. The reversal of 2164640343780 is 873430464612.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18038669472 + ... + 18038669591.

It is an arithmetic number, because the mean of its divisors is an integer number (252541373448).

Almost surely, 2^{2164640343780} is an apocalyptic number.

2164640343780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2164640343780 is an abundant number, since it is smaller than the sum of its proper divisors (3896352618972).

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

2164640343780 is a wasteful number, since it uses less digits than its factorization.

2164640343780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36077339075 (or 36077339073 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 48.

The spelling of 2164640343780 in words is "two trillion, one hundred sixty-four billion, six hundred forty million, three hundred forty-three thousand, seven hundred eighty".