63541681972 has 12 divisors (see below), whose sum is σ = 114203293540. Its totient is φ = 30912169536.

The previous prime is 63541681963. The next prime is 63541681993. The reversal of 63541681972 is 27918614536.

It can be written as a sum of positive squares in 2 ways, for example, as 53285258896 + 10256423076 = 230836^2 + 101274^2 .

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 214667697 + ... + 214667992.

Almost surely, 2^63541681972 is an apocalyptic number.

It is an amenable number.

63541681972 is a deficient number, since it is larger than the sum of its proper divisors (50661611568).

63541681972 is a wasteful number, since it uses less digits than its factorization.

63541681972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429335730 (or 429335728 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 52.

The spelling of 63541681972 in words is "sixty-three billion, five hundred forty-one million, six hundred eighty-one thousand, nine hundred seventy-two".