64618715 has 16 divisors (see below), whose sum is σ = 93285120. Its totient is φ = 41977440.

The previous prime is 64618709. The next prime is 64618769. The reversal of 64618715 is 51781646.

64618715 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 64618715 - 2¹² = 64614619 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47921 + ... + 49250.

It is an arithmetic number, because the mean of its divisors is an integer number (5830320).

Almost surely, 2^64618715 is an apocalyptic number.

64618715 is a deficient number, since it is larger than the sum of its proper divisors (28666405).

64618715 is a wasteful number, since it uses less digits than its factorization.

64618715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97202.

The product of its digits is 40320, while the sum is 38.

The square root of 64618715 is about 8038.5766774971. The cubic root of 64618715 is about 401.2848580140.

The spelling of 64618715 in words is "sixty-four million, six hundred eighteen thousand, seven hundred fifteen".