68982315881 has 2 divisors, whose sum is σ = 68982315882. Its totient is φ = 68982315880.

The previous prime is 68982315833. The next prime is 68982315901. The reversal of 68982315881 is 18851328986.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45332797225 + 23649518656 = 212915^2 + 153784^2 .

It is a cyclic number.

It is not a de Polignac number, because 68982315881 - 2⁶ = 68982315817 is a prime.

It is a super-2 number, since 2×68982315881² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 68982315881.

It is not a weakly prime, because it can be changed into another prime (68982315481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34491157940 + 34491157941.

It is an arithmetic number, because the mean of its divisors is an integer number (34491157941).

Almost surely, 2^68982315881 is an apocalyptic number.

It is an amenable number.

68982315881 is a deficient number, since it is larger than the sum of its proper divisors (1).

68982315881 is an equidigital number, since it uses as much as digits as its factorization.

68982315881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6635520, while the sum is 59.

The spelling of 68982315881 in words is "sixty-eight billion, nine hundred eighty-two million, three hundred fifteen thousand, eight hundred eighty-one".