63520413516444 has 72 divisors (see below), whose sum is σ = 157477753637680. Its totient is φ = 19923908050944.

The previous prime is 63520413516437. The next prime is 63520413516479. The reversal of 63520413516444 is 44461531402536.

It is a junction number, because it is equal to n+sod(n) for n = 63520413516393 and 63520413516402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15158844 + ... + 18889980.

Almost surely, 2^{63520413516444} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63520413516444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78738876818840).

63520413516444 is an abundant number, since it is smaller than the sum of its proper divisors (93957340121236).

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

63520413516444 is a wasteful number, since it uses less digits than its factorization.

63520413516444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3736087 (or 3736068 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 48.

The spelling of 63520413516444 in words is "sixty-three trillion, five hundred twenty billion, four hundred thirteen million, five hundred sixteen thousand, four hundred forty-four".