63957491520 has 224 divisors, whose sum is σ = 222394515840. Its totient is φ = 15476367360.

The previous prime is 63957491501. The next prime is 63957491531. The reversal of 63957491520 is 2519475936.

63957491520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 692890 + ... + 779750.

It is an arithmetic number, because the mean of its divisors is an integer number (992832660).

Almost surely, 2^63957491520 is an apocalyptic number.

63957491520 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 63957491520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111197257920).

63957491520 is an abundant number, since it is smaller than the sum of its proper divisors (158437024320).

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

63957491520 is a wasteful number, since it uses less digits than its factorization.

63957491520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86953 (or 86943 counting only the distinct ones).

The product of its (nonzero) digits is 2041200, while the sum is 51.

The spelling of 63957491520 in words is "sixty-three billion, nine hundred fifty-seven million, four hundred ninety-one thousand, five hundred twenty".