68681975571 has 64 divisors (see below), whose sum is σ = 112895884800. Its totient is φ = 40917571200.

The previous prime is 68681975567. The next prime is 68681975603. The reversal of 68681975571 is 17557918686.

68681975571 is a `hidden beast` number, since 6 + 8 + 68 + 19 + 7 + 557 + 1 = 666.

It is not a de Polignac number, because 68681975571 - 2² = 68681975567 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68681975499 and 68681975508.

It is not an unprimeable number, because it can be changed into a prime (68681975521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10125201 + ... + 10131981.

It is an arithmetic number, because the mean of its divisors is an integer number (1763998200).

Almost surely, 2^68681975571 is an apocalyptic number.

68681975571 is a deficient number, since it is larger than the sum of its proper divisors (44213909229).

68681975571 is a wasteful number, since it uses less digits than its factorization.

68681975571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7377 (or 7371 counting only the distinct ones).

The product of its digits is 25401600, while the sum is 63.

The spelling of 68681975571 in words is "sixty-eight billion, six hundred eighty-one million, nine hundred seventy-five thousand, five hundred seventy-one".