63725848821 has 32 divisors (see below), whose sum is σ = 94633758720. Its totient is φ = 42382760112.

The previous prime is 63725848819. The next prime is 63725848829. The reversal of 63725848821 is 12884852736.

63725848821 is a `hidden beast` number, since 6 + 37 + 2 + 584 + 8 + 8 + 21 = 666.

It is not a de Polignac number, because 63725848821 - 2¹ = 63725848819 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63725848829) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29735676 + ... + 29737818.

It is an arithmetic number, because the mean of its divisors is an integer number (2957304960).

Almost surely, 2^63725848821 is an apocalyptic number.

It is an amenable number.

63725848821 is a deficient number, since it is larger than the sum of its proper divisors (30907909899).

63725848821 is a wasteful number, since it uses less digits than its factorization.

63725848821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4262 (or 4256 counting only the distinct ones).

The product of its digits is 5160960, while the sum is 54.

The spelling of 63725848821 in words is "sixty-three billion, seven hundred twenty-five million, eight hundred forty-eight thousand, eight hundred twenty-one".