64315563 has 16 divisors (see below), whose sum is σ = 93655296. Its totient is φ = 39019680.

The previous prime is 64315549. The next prime is 64315571. The reversal of 64315563 is 36551346.

It is not a de Polignac number, because 64315563 - 2⁴ = 64315547 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64315663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8845 + ... + 14382.

It is an arithmetic number, because the mean of its divisors is an integer number (5853456).

Almost surely, 2^64315563 is an apocalyptic number.

64315563 is a deficient number, since it is larger than the sum of its proper divisors (29339733).

64315563 is a wasteful number, since it uses less digits than its factorization.

64315563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23314.

The product of its digits is 32400, while the sum is 33.

The square root of 64315563 is about 8019.6984357269. The cubic root of 64315563 is about 400.6563453546.

The spelling of 64315563 in words is "sixty-four million, three hundred fifteen thousand, five hundred sixty-three".