649613493760 has 720 divisors, whose sum is σ = 2013168148992. Its totient is φ = 200286535680.

The previous prime is 649613493733. The next prime is 649613493799. The reversal of 649613493760 is 67394316946.

It is a junction number, because it is equal to n+sod(n) for n = 649613493695 and 649613493704.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1927636312 + ... + 1927636648.

Almost surely, 2^649613493760 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 649613493760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1006584074496).

649613493760 is an abundant number, since it is smaller than the sum of its proper divisors (1363554655232).

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

649613493760 is a wasteful number, since it uses less digits than its factorization.

649613493760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523 (or 489 counting only the distinct ones).

The product of its (nonzero) digits is 17635968, while the sum is 58.

The spelling of 649613493760 in words is "six hundred forty-nine billion, six hundred thirteen million, four hundred ninety-three thousand, seven hundred sixty".