64625818 has 8 divisors (see below), whose sum is σ = 99193248. Its totient is φ = 31561404.

The previous prime is 64625809. The next prime is 64625819. The reversal of 64625818 is 81852646.

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 (64625819) 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, 375646 + ... + 375817.

It is an arithmetic number, because the mean of its divisors is an integer number (12399156).

Almost surely, 2^64625818 is an apocalyptic number.

64625818 is a deficient number, since it is larger than the sum of its proper divisors (34567430).

64625818 is a wasteful number, since it uses less digits than its factorization.

64625818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 751508.

The product of its digits is 92160, while the sum is 40.

The square root of 64625818 is about 8039.0184724256. The cubic root of 64625818 is about 401.2995607820.

The spelling of 64625818 in words is "sixty-four million, six hundred twenty-five thousand, eight hundred eighteen".