649805774 has 8 divisors (see below), whose sum is σ = 988437168. Its totient is φ = 320326720.

The previous prime is 649805771. The next prime is 649805797. The reversal of 649805774 is 477508946.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649805771) 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, 2287907 + ... + 2288190.

It is an arithmetic number, because the mean of its divisors is an integer number (123554646).

Almost surely, 2^649805774 is an apocalyptic number.

649805774 is a deficient number, since it is larger than the sum of its proper divisors (338631394).

649805774 is a wasteful number, since it uses less digits than its factorization.

649805774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4576170.

The product of its (nonzero) digits is 1693440, while the sum is 50.

The square root of 649805774 is about 25491.2881981276. The cubic root of 649805774 is about 866.1528166655.

The spelling of 649805774 in words is "six hundred forty-nine million, eight hundred five thousand, seven hundred seventy-four".