68877220283881 has 2 divisors, whose sum is σ = 68877220283882. Its totient is φ = 68877220283880.

The previous prime is 68877220283857. The next prime is 68877220283887. The reversal of 68877220283881 is 18838202277886.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63988544512656 + 4888675771225 = 7999284^2 + 2211035^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68877220283881 is a prime.

It is a super-2 number, since 2×68877220283881² (a number of 28 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 68877220283881.

It is not a weakly prime, because it can be changed into another prime (68877220283887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34438610141940 + 34438610141941.

It is an arithmetic number, because the mean of its divisors is an integer number (34438610141941).

Almost surely, 2^{68877220283881} is an apocalyptic number.

It is an amenable number.

68877220283881 is a deficient number, since it is larger than the sum of its proper divisors (1).

68877220283881 is an equidigital number, since it uses as much as digits as its factorization.

68877220283881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 231211008, while the sum is 70.

The spelling of 68877220283881 in words is "sixty-eight trillion, eight hundred seventy-seven billion, two hundred twenty million, two hundred eighty-three thousand, eight hundred eighty-one".