649536856 has 16 divisors (see below), whose sum is σ = 1219150440. Its totient is φ = 324430080.

The previous prime is 649536847. The next prime is 649536911. The reversal of 649536856 is 658635946.

649536856 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34041 + ... + 49576.

Almost surely, 2^649536856 is an apocalyptic number.

It is an amenable number.

649536856 is a deficient number, since it is larger than the sum of its proper divisors (569613584).

649536856 is a wasteful number, since it uses less digits than its factorization.

649536856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84594 (or 84590 counting only the distinct ones).

The product of its digits is 4665600, while the sum is 52.

The square root of 649536856 is about 25486.0129482820. The cubic root of 649536856 is about 866.0333162284.

Adding to 649536856 its product of digits (4665600), we get a palindrome (654202456).

The spelling of 649536856 in words is "six hundred forty-nine million, five hundred thirty-six thousand, eight hundred fifty-six".