649388707883946 has 48 divisors (see below), whose sum is σ = 1461647181616128. Its totient is φ = 208145959351200.

The previous prime is 649388707883897. The next prime is 649388707883953.

It is a happy number.

649388707883946 is a `hidden beast` number, since 6 + 4 + 9 + 3 + 88 + 70 + 78 + 8 + 394 + 6 = 666.

649388707883946 is nontrivially palindromic in base 10.

649388707883946 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 3706215090 + ... + 3706390301.

It is an arithmetic number, because the mean of its divisors is an integer number (30450982950336).

Almost surely, 2^{649388707883946} is an apocalyptic number.

649388707883946 is an abundant number, since it is smaller than the sum of its proper divisors (812258473732182).

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

649388707883946 is a wasteful number, since it uses less digits than its factorization.

649388707883946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7412605587 (or 7412605584 counting only the distinct ones).

The product of its (nonzero) digits is 84276412416, while the sum is 90.

The spelling of 649388707883946 in words is "six hundred forty-nine trillion, three hundred eighty-eight billion, seven hundred seven million, eight hundred eighty-three thousand, nine hundred forty-six".