649911415388 has 6 divisors (see below), whose sum is σ = 1137344976936. Its totient is φ = 324955707692.

The previous prime is 649911415381. The next prime is 649911415399. The reversal of 649911415388 is 883514119946.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649911415381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81238926920 + ... + 81238926927.

It is an arithmetic number, because the mean of its divisors is an integer number (189557496156).

Almost surely, 2^649911415388 is an apocalyptic number.

It is an amenable number.

649911415388 is a deficient number, since it is larger than the sum of its proper divisors (487433561548).

649911415388 is a wasteful number, since it uses less digits than its factorization.

649911415388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162477853851 (or 162477853849 counting only the distinct ones).

The product of its digits is 7464960, while the sum is 59.

The spelling of 649911415388 in words is "six hundred forty-nine billion, nine hundred eleven million, four hundred fifteen thousand, three hundred eighty-eight".