63520513452 has 144 divisors (see below), whose sum is σ = 177406354944. Its totient is φ = 19003680000.

The previous prime is 63520513411. The next prime is 63520513487. The reversal of 63520513452 is 25431502536.

63520513452 is a `hidden beast` number, since 6 + 3 + 520 + 51 + 34 + 52 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9982752 + ... + 9989112.

It is an arithmetic number, because the mean of its divisors is an integer number (1231988576).

Almost surely, 2^63520513452 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 63520513452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88703177472).

63520513452 is an abundant number, since it is smaller than the sum of its proper divisors (113885841492).

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

63520513452 is a wasteful number, since it uses less digits than its factorization.

63520513452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6700 (or 6695 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 36.

The spelling of 63520513452 in words is "sixty-three billion, five hundred twenty million, five hundred thirteen thousand, four hundred fifty-two".