64605523 has 2 divisors, whose sum is σ = 64605524. Its totient is φ = 64605522.

The previous prime is 64605503. The next prime is 64605557. The reversal of 64605523 is 32550646.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64605523 is a prime.

It is not a weakly prime, because it can be changed into another prime (64605503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32302761 + 32302762.

It is an arithmetic number, because the mean of its divisors is an integer number (32302762).

Almost surely, 2^64605523 is an apocalyptic number.

64605523 is a deficient number, since it is larger than the sum of its proper divisors (1).

64605523 is an equidigital number, since it uses as much as digits as its factorization.

64605523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 31.

The square root of 64605523 is about 8037.7560923432. The cubic root of 64605523 is about 401.2575485360.

The spelling of 64605523 in words is "sixty-four million, six hundred five thousand, five hundred twenty-three".