649577757696 has 352 divisors, whose sum is σ = 2113022791680. Its totient is φ = 173408256000.

The previous prime is 649577757659. The next prime is 649577757737. The reversal of 649577757696 is 696757775946.

It is a congruent number.

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, 19315296 + ... + 19348896.

Almost surely, 2^649577757696 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 649577757696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1056511395840).

649577757696 is an abundant number, since it is smaller than the sum of its proper divisors (1463445033984).

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

649577757696 is a wasteful number, since it uses less digits than its factorization.

649577757696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33691 (or 33673 counting only the distinct ones).

The product of its digits is 4200789600, while the sum is 78.

The spelling of 649577757696 in words is "six hundred forty-nine billion, five hundred seventy-seven million, seven hundred fifty-seven thousand, six hundred ninety-six".