64057705493 has 2 divisors, whose sum is σ = 64057705494. Its totient is φ = 64057705492.

The previous prime is 64057705489. The next prime is 64057705529. The reversal of 64057705493 is 39450775046.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60788381809 + 3269323684 = 246553^2 + 57178^2 .

It is a cyclic number.

It is not a de Polignac number, because 64057705493 - 2² = 64057705489 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64057705193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32028852746 + 32028852747.

It is an arithmetic number, because the mean of its divisors is an integer number (32028852747).

Almost surely, 2^64057705493 is an apocalyptic number.

It is an amenable number.

64057705493 is a deficient number, since it is larger than the sum of its proper divisors (1).

64057705493 is an equidigital number, since it uses as much as digits as its factorization.

64057705493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3175200, while the sum is 50.

The spelling of 64057705493 in words is "sixty-four billion, fifty-seven million, seven hundred five thousand, four hundred ninety-three".