64618385 has 16 divisors (see below), whose sum is σ = 87139584. Its totient is φ = 45642432.

The previous prime is 64618381. The next prime is 64618399. The reversal of 64618385 is 58381646.

It is a cyclic number.

It is not a de Polignac number, because 64618385 - 2² = 64618381 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64618381) 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, 20117 + ... + 23106.

It is an arithmetic number, because the mean of its divisors is an integer number (5446224).

Almost surely, 2^64618385 is an apocalyptic number.

64618385 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

64618385 is a deficient number, since it is larger than the sum of its proper divisors (22521199).

64618385 is a wasteful number, since it uses less digits than its factorization.

64618385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43264.

The product of its digits is 138240, while the sum is 41.

The square root of 64618385 is about 8038.5561514491. The cubic root of 64618385 is about 401.2841749084.

The spelling of 64618385 in words is "sixty-four million, six hundred eighteen thousand, three hundred eighty-five".