64531359413 has 2 divisors, whose sum is σ = 64531359414. Its totient is φ = 64531359412.

The previous prime is 64531359391. The next prime is 64531359421. The reversal of 64531359413 is 31495313546.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45171976369 + 19359383044 = 212537^2 + 139138^2 .

It is a cyclic number.

It is not a de Polignac number, because 64531359413 - 2²⁰ = 64530310837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64531359443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32265679706 + 32265679707.

It is an arithmetic number, because the mean of its divisors is an integer number (32265679707).

Almost surely, 2^64531359413 is an apocalyptic number.

It is an amenable number.

64531359413 is a deficient number, since it is larger than the sum of its proper divisors (1).

64531359413 is an equidigital number, since it uses as much as digits as its factorization.

64531359413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 583200, while the sum is 44.

The spelling of 64531359413 in words is "sixty-four billion, five hundred thirty-one million, three hundred fifty-nine thousand, four hundred thirteen".