64618818 has 32 divisors (see below), whose sum is σ = 145539072. Its totient is φ = 18949200.

The previous prime is 64618811. The next prime is 64618847. The reversal of 64618818 is 81881646.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 64618818.

It is not an unprimeable number, because it can be changed into a prime (64618811) 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, 13746 + ... + 17837.

It is an arithmetic number, because the mean of its divisors is an integer number (4548096).

Almost surely, 2^64618818 is an apocalyptic number.

64618818 is an abundant number, since it is smaller than the sum of its proper divisors (80920254).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64618818 is a wasteful number, since it uses less digits than its factorization.

64618818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31630.

The product of its digits is 73728, while the sum is 42.

The square root of 64618818 is about 8038.5830841013. The cubic root of 64618818 is about 401.2850712253.

The spelling of 64618818 in words is "sixty-four million, six hundred eighteen thousand, eight hundred eighteen".