64520363 has 4 divisors (see below), whose sum is σ = 64635528. Its totient is φ = 64405200.

The previous prime is 64520353. The next prime is 64520369. The reversal of 64520363 is 36302546.

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 64520363 - 2¹⁸ = 64258219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64520369) 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, 56738 + ... + 57863.

It is an arithmetic number, because the mean of its divisors is an integer number (16158882).

Almost surely, 2^64520363 is an apocalyptic number.

64520363 is a deficient number, since it is larger than the sum of its proper divisors (115165).

64520363 is a wasteful number, since it uses less digits than its factorization.

64520363 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115164.

The product of its (nonzero) digits is 12960, while the sum is 29.

The square root of 64520363 is about 8032.4568470674. The cubic root of 64520363 is about 401.0811646579.

The spelling of 64520363 in words is "sixty-four million, five hundred twenty thousand, three hundred sixty-three".