649416818 has 8 divisors (see below), whose sum is σ = 978006960. Its totient is φ = 323414500.

The previous prime is 649416793. The next prime is 649416829. The reversal of 649416818 is 818614946.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 646328 + ... + 647331.

It is an arithmetic number, because the mean of its divisors is an integer number (122250870).

Almost surely, 2^649416818 is an apocalyptic number.

649416818 is a deficient number, since it is larger than the sum of its proper divisors (328590142).

649416818 is a wasteful number, since it uses less digits than its factorization.

649416818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1293912.

The product of its digits is 331776, while the sum is 47.

The square root of 649416818 is about 25483.6578614609. The cubic root of 649416818 is about 865.9799636943.

The spelling of 649416818 in words is "six hundred forty-nine million, four hundred sixteen thousand, eight hundred eighteen".