649162188 has 60 divisors (see below), whose sum is σ = 1742936272. Its totient is φ = 210535200.

The previous prime is 649162141. The next prime is 649162201. The reversal of 649162188 is 881261946.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 15088 + ... + 39063.

Almost surely, 2^649162188 is an apocalyptic number.

It is an amenable number.

649162188 is an abundant number, since it is smaller than the sum of its proper divisors (1093774084).

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

649162188 is a wasteful number, since it uses less digits than its factorization.

649162188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54204 (or 54193 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 649162188 is about 25478.6614248080. The cubic root of 649162188 is about 865.8667681330.

The spelling of 649162188 in words is "six hundred forty-nine million, one hundred sixty-two thousand, one hundred eighty-eight".