64532765117 has 2 divisors, whose sum is σ = 64532765118. Its totient is φ = 64532765116.

The previous prime is 64532765071. The next prime is 64532765147. The reversal of 64532765117 is 71156723546.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46444129081 + 18088636036 = 215509^2 + 134494^2 .

It is a cyclic number.

It is not a de Polignac number, because 64532765117 - 2³⁰ = 63459023293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64532765147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32266382558 + 32266382559.

It is an arithmetic number, because the mean of its divisors is an integer number (32266382559).

Almost surely, 2^64532765117 is an apocalyptic number.

It is an amenable number.

64532765117 is a deficient number, since it is larger than the sum of its proper divisors (1).

64532765117 is an equidigital number, since it uses as much as digits as its factorization.

64532765117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1058400, while the sum is 47.

The spelling of 64532765117 in words is "sixty-four billion, five hundred thirty-two million, seven hundred sixty-five thousand, one hundred seventeen".