68276972261 has 2 divisors, whose sum is σ = 68276972262. Its totient is φ = 68276972260.

The previous prime is 68276972251. The next prime is 68276972263. The reversal of 68276972261 is 16227967286.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36808341025 + 31468631236 = 191855^2 + 177394^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68276972261 is a prime.

It is a super-2 number, since 2×68276972261² (a number of 22 digits) contains 22 as substring.

Together with 68276972263, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 68276972197 and 68276972206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68276972263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34138486130 + 34138486131.

It is an arithmetic number, because the mean of its divisors is an integer number (34138486131).

Almost surely, 2^68276972261 is an apocalyptic number.

It is an amenable number.

68276972261 is a deficient number, since it is larger than the sum of its proper divisors (1).

68276972261 is an equidigital number, since it uses as much as digits as its factorization.

68276972261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6096384, while the sum is 56.

The spelling of 68276972261 in words is "sixty-eight billion, two hundred seventy-six million, nine hundred seventy-two thousand, two hundred sixty-one".