68572542221 has 16 divisors (see below), whose sum is σ = 71052979200. Its totient is φ = 66109253760.

The previous prime is 68572542197. The next prime is 68572542223. The reversal of 68572542221 is 12224527586.

It is a cyclic number.

It is not a de Polignac number, because 68572542221 - 2²² = 68568347917 is a prime.

It is a super-2 number, since 2×68572542221² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68572542223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15501416 + ... + 15505838.

It is an arithmetic number, because the mean of its divisors is an integer number (4440811200).

Almost surely, 2^68572542221 is an apocalyptic number.

It is an amenable number.

68572542221 is a deficient number, since it is larger than the sum of its proper divisors (2480436979).

68572542221 is a wasteful number, since it uses less digits than its factorization.

68572542221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6236.

The product of its digits is 537600, while the sum is 44.

The spelling of 68572542221 in words is "sixty-eight billion, five hundred seventy-two million, five hundred forty-two thousand, two hundred twenty-one".