649036918 has 8 divisors (see below), whose sum is σ = 973876680. Its totient is φ = 324411360.

The previous prime is 649036891. The next prime is 649036919. The reversal of 649036918 is 819630946.

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 (649036919) 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, 45748 + ... + 58231.

It is an arithmetic number, because the mean of its divisors is an integer number (121734585).

Almost surely, 2^649036918 is an apocalyptic number.

649036918 is a deficient number, since it is larger than the sum of its proper divisors (324839762).

649036918 is a wasteful number, since it uses less digits than its factorization.

649036918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107102.

The product of its (nonzero) digits is 279936, while the sum is 46.

The square root of 649036918 is about 25476.2029745408. The cubic root of 649036918 is about 865.8110685920.

The spelling of 649036918 in words is "six hundred forty-nine million, thirty-six thousand, nine hundred eighteen".