63999606557772 has 96 divisors (see below), whose sum is σ = 174372371712000. Its totient is φ = 20273916793536.

The previous prime is 63999606557753. The next prime is 63999606557867. The reversal of 63999606557772 is 27775560699936.

63999606557772 is a `hidden beast` number, since 6 + 39 + 9 + 9 + 6 + 0 + 6 + 5 + 577 + 7 + 2 = 666.

It is a super-2 number, since 2×63999606557772² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 63999606557691 and 63999606557700.

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 31 ways as a sum of consecutive naturals, for example, 186059772 + ... + 186403427.

It is an arithmetic number, because the mean of its divisors is an integer number (1816378872000).

Almost surely, 2^{63999606557772} is an apocalyptic number.

It is an amenable number.

63999606557772 is an abundant number, since it is smaller than the sum of its proper divisors (110372765154228).

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

63999606557772 is a wasteful number, since it uses less digits than its factorization.

63999606557772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372463292 (or 372463284 counting only the distinct ones).

The product of its (nonzero) digits is 8101522800, while the sum is 81.

The spelling of 63999606557772 in words is "sixty-three trillion, nine hundred ninety-nine billion, six hundred six million, five hundred fifty-seven thousand, seven hundred seventy-two".