649388883946 has 64 divisors (see below), whose sum is σ = 1122554557440. Its totient is φ = 278857490560.

The previous prime is 649388883919. The next prime is 649388883953.

649388883946 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42639585 + ... + 42654811.

It is an arithmetic number, because the mean of its divisors is an integer number (17539914960).

Almost surely, 2^649388883946 is an apocalyptic number.

649388883946 is a deficient number, since it is larger than the sum of its proper divisors (473165673494).

649388883946 is a wasteful number, since it uses less digits than its factorization.

649388883946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16299.

The product of its digits is 1719926784, while the sum is 76.

The spelling of 649388883946 in words is "six hundred forty-nine billion, three hundred eighty-eight million, eight hundred eighty-three thousand, nine hundred forty-six".