63520349520 has 80 divisors (see below), whose sum is σ = 203703212160. Its totient is φ = 16354662912.

The previous prime is 63520349513. The next prime is 63520349539. The reversal of 63520349520 is 2594302536.

63520349520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4556284 + ... + 4570203.

It is an arithmetic number, because the mean of its divisors is an integer number (2546290152).

Almost surely, 2^63520349520 is an apocalyptic number.

63520349520 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

63520349520 is an abundant number, since it is smaller than the sum of its proper divisors (140182862640).

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

63520349520 is a wasteful number, since it uses less digits than its factorization.

63520349520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9126532 (or 9126526 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 39.

The spelling of 63520349520 in words is "sixty-three billion, five hundred twenty million, three hundred forty-nine thousand, five hundred twenty".