64525523 has 4 divisors (see below), whose sum is σ = 68321160. Its totient is φ = 60729888.

The previous prime is 64525507. The next prime is 64525529. The reversal of 64525523 is 32552546.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64525523 - 2⁴ = 64525507 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64525523.

It is not an unprimeable number, because it can be changed into a prime (64525529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1897793 + ... + 1897826.

It is an arithmetic number, because the mean of its divisors is an integer number (17080290).

Almost surely, 2^64525523 is an apocalyptic number.

64525523 is a deficient number, since it is larger than the sum of its proper divisors (3795637).

64525523 is a wasteful number, since it uses less digits than its factorization.

64525523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3795636.

The product of its digits is 36000, while the sum is 32.

The square root of 64525523 is about 8032.7780375160. The cubic root of 64525523 is about 401.0918564950.

The spelling of 64525523 in words is "sixty-four million, five hundred twenty-five thousand, five hundred twenty-three".