63939870720 has 816 divisors, whose sum is σ = 254198048832. Its totient is φ = 15288238080.

The previous prime is 63939870667. The next prime is 63939870749. The reversal of 63939870720 is 2707893936.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 875888604 + ... + 875888676.

Almost surely, 2^63939870720 is an apocalyptic number.

63939870720 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 63939870720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127099024416).

63939870720 is an abundant number, since it is smaller than the sum of its proper divisors (190258178112).

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

63939870720 is an frugal number, since it uses more digits than its factorization.

63939870720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136 (or 94 counting only the distinct ones).

The product of its (nonzero) digits is 3429216, while the sum is 54.

The spelling of 63939870720 in words is "sixty-three billion, nine hundred thirty-nine million, eight hundred seventy thousand, seven hundred twenty".