649681674 has 32 divisors (see below), whose sum is σ = 1313141760. Its totient is φ = 214275072.

The previous prime is 649681661. The next prime is 649681709. The reversal of 649681674 is 476186946.

649681674 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 289047 + ... + 291285.

It is an arithmetic number, because the mean of its divisors is an integer number (41035680).

Almost surely, 2^649681674 is an apocalyptic number.

649681674 is an abundant number, since it is smaller than the sum of its proper divisors (663460086).

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

649681674 is a wasteful number, since it uses less digits than its factorization.

649681674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2734.

The product of its digits is 1741824, while the sum is 51.

The square root of 649681674 is about 25488.8539169575. The cubic root of 649681674 is about 866.0976738252.

The spelling of 649681674 in words is "six hundred forty-nine million, six hundred eighty-one thousand, six hundred seventy-four".