72446255426681 has 2 divisors, whose sum is σ = 72446255426682. Its totient is φ = 72446255426680.

The previous prime is 72446255426659. The next prime is 72446255426711. The reversal of 72446255426681 is 18662455264427.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62437510831081 + 10008744595600 = 7901741^2 + 3163660^2 .

It is a cyclic number.

It is not a de Polignac number, because 72446255426681 - 2⁶ = 72446255426617 is a prime.

It is a super-2 number, since 2×72446255426681² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (72446255426581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36223127713340 + 36223127713341.

It is an arithmetic number, because the mean of its divisors is an integer number (36223127713341).

Almost surely, 2^{72446255426681} is an apocalyptic number.

It is an amenable number.

72446255426681 is a deficient number, since it is larger than the sum of its proper divisors (1).

72446255426681 is an equidigital number, since it uses as much as digits as its factorization.

72446255426681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 154828800, while the sum is 62.

The spelling of 72446255426681 in words is "seventy-two trillion, four hundred forty-six billion, two hundred fifty-five million, four hundred twenty-six thousand, six hundred eighty-one".