649160864 has 24 divisors (see below), whose sum is σ = 1394221248. Its totient is φ = 295072960.

The previous prime is 649160843. The next prime is 649160873. The reversal of 649160864 is 468061946.

It is a Harshad number since it is a multiple of its sum of digits (44).

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, 921752 + ... + 922455.

It is an arithmetic number, because the mean of its divisors is an integer number (58092552).

Almost surely, 2^649160864 is an apocalyptic number.

It is an amenable number.

649160864 is an abundant number, since it is smaller than the sum of its proper divisors (745060384).

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

649160864 is a wasteful number, since it uses less digits than its factorization.

649160864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1844228 (or 1844220 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 44.

The square root of 649160864 is about 25478.6354422681. The cubic root of 649160864 is about 865.8661794726.

The spelling of 649160864 in words is "six hundred forty-nine million, one hundred sixty thousand, eight hundred sixty-four".