63661572252 has 36 divisors (see below), whose sum is σ = 163560383896. Its totient is φ = 20872645920.

The previous prime is 63661572211. The next prime is 63661572287. The reversal of 63661572252 is 25227516636.

63661572252 is a `hidden beast` number, since 6 + 3 + 6 + 615 + 7 + 2 + 25 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 63661572198 and 63661572207.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14492698 + ... + 14497089.

Almost surely, 2^63661572252 is an apocalyptic number.

It is an amenable number.

63661572252 is an abundant number, since it is smaller than the sum of its proper divisors (99898811644).

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

63661572252 is a wasteful number, since it uses less digits than its factorization.

63661572252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28989858 (or 28989853 counting only the distinct ones).

The product of its digits is 907200, while the sum is 45.

The spelling of 63661572252 in words is "sixty-three billion, six hundred sixty-one million, five hundred seventy-two thousand, two hundred fifty-two".