68572576784161 has 4 divisors (see below), whose sum is σ = 69201682993300. Its totient is φ = 67943470575024.

The previous prime is 68572576784123. The next prime is 68572576784197. The reversal of 68572576784161 is 16148767527586.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32972631152400 + 35599945631761 = 5742180^2 + 5966569^2 .

It is a cyclic number.

It is not a de Polignac number, because 68572576784161 - 2¹⁷ = 68572576653089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68572576784461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 314553104406 + ... + 314553104623.

It is an arithmetic number, because the mean of its divisors is an integer number (17300420748325).

Almost surely, 2^{68572576784161} is an apocalyptic number.

It is an amenable number.

68572576784161 is a deficient number, since it is larger than the sum of its proper divisors (629106209139).

68572576784161 is a wasteful number, since it uses less digits than its factorization.

68572576784161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629106209138.

The product of its digits is 948326400, while the sum is 73.

The spelling of 68572576784161 in words is "sixty-eight trillion, five hundred seventy-two billion, five hundred seventy-six million, seven hundred eighty-four thousand, one hundred sixty-one".