64156568293 has 2 divisors, whose sum is σ = 64156568294. Its totient is φ = 64156568292.

The previous prime is 64156568279. The next prime is 64156568363. The reversal of 64156568293 is 39286565146.

64156568293 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63827980164 + 328588129 = 252642^2 + 18127^2 .

It is a cyclic number.

It is not a de Polignac number, because 64156568293 - 2²⁹ = 63619697381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64156568263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32078284146 + 32078284147.

It is an arithmetic number, because the mean of its divisors is an integer number (32078284147).

Almost surely, 2^64156568293 is an apocalyptic number.

It is an amenable number.

64156568293 is a deficient number, since it is larger than the sum of its proper divisors (1).

64156568293 is an equidigital number, since it uses as much as digits as its factorization.

64156568293 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9331200, while the sum is 55.

The spelling of 64156568293 in words is "sixty-four billion, one hundred fifty-six million, five hundred sixty-eight thousand, two hundred ninety-three".