64576513 has 2 divisors, whose sum is σ = 64576514. Its totient is φ = 64576512.

The previous prime is 64576511. The next prime is 64576541. The reversal of 64576513 is 31567546.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46403344 + 18173169 = 6812^2 + 4263^2 .

It is a cyclic number.

It is not a de Polignac number, because 64576513 - 2¹ = 64576511 is a prime.

Together with 64576511, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (64576511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32288256 + 32288257.

It is an arithmetic number, because the mean of its divisors is an integer number (32288257).

Almost surely, 2^64576513 is an apocalyptic number.

It is an amenable number.

64576513 is a deficient number, since it is larger than the sum of its proper divisors (1).

64576513 is an equidigital number, since it uses as much as digits as its factorization.

64576513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75600, while the sum is 37.

The square root of 64576513 is about 8035.9512815845. The cubic root of 64576513 is about 401.1974802751.

The spelling of 64576513 in words is "sixty-four million, five hundred seventy-six thousand, five hundred thirteen".