2165539821344 has 24 divisors (see below), whose sum is σ = 4323454507008. Its totient is φ = 1067519629120.

The previous prime is 2165539821337. The next prime is 2165539821377. The reversal of 2165539821344 is 4431289355612.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 476568992 + ... + 476573535.

It is an arithmetic number, because the mean of its divisors is an integer number (180143937792).

Almost surely, 2^{2165539821344} is an apocalyptic number.

It is an amenable number.

2165539821344 is a deficient number, since it is larger than the sum of its proper divisors (2157914685664).

2165539821344 is an equidigital number, since it uses as much as digits as its factorization.

2165539821344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 953142608 (or 953142600 counting only the distinct ones).

The product of its digits is 6220800, while the sum is 53.

The spelling of 2165539821344 in words is "two trillion, one hundred sixty-five billion, five hundred thirty-nine million, eight hundred twenty-one thousand, three hundred forty-four".