63520990038 has 144 divisors (see below), whose sum is σ = 161107652160. Its totient is φ = 17888644800.

The previous prime is 63520990031. The next prime is 63520990073. The reversal of 63520990038 is 83009902536.

63520990038 is a `hidden beast` number, since 6 + 3 + 520 + 9 + 90 + 0 + 38 = 666.

63520990038 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 63520989975 and 63520990002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63520990031) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 10564453 + ... + 10570463.

It is an arithmetic number, because the mean of its divisors is an integer number (1118803140).

Almost surely, 2^63520990038 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63520990038, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80553826080).

63520990038 is an abundant number, since it is smaller than the sum of its proper divisors (97586662122).

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

63520990038 is a wasteful number, since it uses less digits than its factorization.

63520990038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6155 (or 6099 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

The spelling of 63520990038 in words is "sixty-three billion, five hundred twenty million, nine hundred ninety thousand, thirty-eight".