2164640343758 has 32 divisors (see below), whose sum is σ = 3277376229600. Its totient is φ = 1072222704000.

The previous prime is 2164640343757. The next prime is 2164640343763. The reversal of 2164640343758 is 8573430464612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2164640343757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 324968948 + ... + 324975608.

It is an arithmetic number, because the mean of its divisors is an integer number (102418007175).

Almost surely, 2^{2164640343758} is an apocalyptic number.

2164640343758 is a deficient number, since it is larger than the sum of its proper divisors (1112735885842).

2164640343758 is a wasteful number, since it uses less digits than its factorization.

2164640343758 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9524.

The product of its (nonzero) digits is 11612160, while the sum is 53.

The spelling of 2164640343758 in words is "two trillion, one hundred sixty-four billion, six hundred forty million, three hundred forty-three thousand, seven hundred fifty-eight".