64615363 has 4 divisors (see below), whose sum is σ = 64633768. Its totient is φ = 64596960.

The previous prime is 64615361. The next prime is 64615367. The reversal of 64615363 is 36351646.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36351646 = 2 ⋅18175823.

It is a cyclic number.

It is not a de Polignac number, because 64615363 - 2¹ = 64615361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64615361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2118 + ... + 11563.

It is an arithmetic number, because the mean of its divisors is an integer number (16158442).

Almost surely, 2^64615363 is an apocalyptic number.

64615363 is a deficient number, since it is larger than the sum of its proper divisors (18405).

64615363 is a wasteful number, since it uses less digits than its factorization.

64615363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18404.

The product of its digits is 38880, while the sum is 34.

The square root of 64615363 is about 8038.3681801719. The cubic root of 64615363 is about 401.2779192084.

The spelling of 64615363 in words is "sixty-four million, six hundred fifteen thousand, three hundred sixty-three".