64550818 has 8 divisors (see below), whose sum is σ = 96907500. Its totient is φ = 32248320.

The previous prime is 64550813. The next prime is 64550831. The reversal of 64550818 is 81805546.

It can be written as a sum of positive squares in 2 ways, for example, as 62773929 + 1776889 = 7923^2 + 1333^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (64550813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10423 + ... + 15418.

Almost surely, 2^64550818 is an apocalyptic number.

64550818 is a deficient number, since it is larger than the sum of its proper divisors (32356682).

64550818 is a wasteful number, since it uses less digits than its factorization.

64550818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27092.

The product of its (nonzero) digits is 38400, while the sum is 37.

The square root of 64550818 is about 8034.3523696686. The cubic root of 64550818 is about 401.1442610454.

The spelling of 64550818 in words is "sixty-four million, five hundred fifty thousand, eight hundred eighteen".