63722492640 has 576 divisors, whose sum is σ = 240384231360. Its totient is φ = 15885434880.

The previous prime is 63722492621. The next prime is 63722492651. The reversal of 63722492640 is 4629422736.

63722492640 is a `hidden beast` number, since 637 + 2 + 2 + 4 + 9 + 2 + 6 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 151359630 + ... + 151360050.

It is an arithmetic number, because the mean of its divisors is an integer number (417333735).

Almost surely, 2^63722492640 is an apocalyptic number.

63722492640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63722492640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120192115680).

63722492640 is an abundant number, since it is smaller than the sum of its proper divisors (176661738720).

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

63722492640 is a wasteful number, since it uses less digits than its factorization.

63722492640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697 (or 677 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 45.

The spelling of 63722492640 in words is "sixty-three billion, seven hundred twenty-two million, four hundred ninety-two thousand, six hundred forty".