64565525413 has 2 divisors, whose sum is σ = 64565525414. Its totient is φ = 64565525412.

The previous prime is 64565525357. The next prime is 64565525417. The reversal of 64565525413 is 31452556546.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63414823329 + 1150702084 = 251823^2 + 33922^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64565525413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64565525417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32282762706 + 32282762707.

It is an arithmetic number, because the mean of its divisors is an integer number (32282762707).

Almost surely, 2^64565525413 is an apocalyptic number.

It is an amenable number.

64565525413 is a deficient number, since it is larger than the sum of its proper divisors (1).

64565525413 is an equidigital number, since it uses as much as digits as its factorization.

64565525413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160000, while the sum is 46.

The spelling of 64565525413 in words is "sixty-four billion, five hundred sixty-five million, five hundred twenty-five thousand, four hundred thirteen".