649051056 has 120 divisors (see below), whose sum is σ = 1904242704. Its totient is φ = 213995520.

The previous prime is 649051009. The next prime is 649051093. The reversal of 649051056 is 650150946.

649051056 is a `hidden beast` number, since 6 + 4 + 90 + 510 + 56 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 649051056.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 376276 + ... + 377996.

Almost surely, 2^649051056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 649051056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (952121352).

649051056 is an abundant number, since it is smaller than the sum of its proper divisors (1255191648).

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

649051056 is a wasteful number, since it uses less digits than its factorization.

649051056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1841 (or 1823 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 649051056 is about 25476.4804476600. The cubic root of 649051056 is about 865.8173552133.

The spelling of 649051056 in words is "six hundred forty-nine million, fifty-one thousand, fifty-six".