97640164657940 has 24 divisors (see below), whose sum is σ = 205097178808872. Its totient is φ = 39046002429440.

The previous prime is 97640164657927. The next prime is 97640164657943. The reversal of 97640164657940 is 4975646104679.

97640164657940 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 391169284 + 97639773488656 = 19778^2 + 9881284^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97640164657943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 628885049 + ... + 629040288.

It is an arithmetic number, because the mean of its divisors is an integer number (8545715783703).

Almost surely, 2^{97640164657940} is an apocalyptic number.

It is an amenable number.

97640164657940 is an abundant number, since it is smaller than the sum of its proper divisors (107457014150932).

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

97640164657940 is a wasteful number, since it uses less digits than its factorization.

97640164657940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1257929227 (or 1257929225 counting only the distinct ones).

The product of its (nonzero) digits is 274337280, while the sum is 68.

The spelling of 97640164657940 in words is "ninety-seven trillion, six hundred forty billion, one hundred sixty-four million, six hundred fifty-seven thousand, nine hundred forty".