80726605049 has 2 divisors, whose sum is σ = 80726605050. Its totient is φ = 80726605048.

The previous prime is 80726605033. The next prime is 80726605079. The reversal of 80726605049 is 94050662708.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80163729424 + 562875625 = 283132^2 + 23725^2 .

It is a cyclic number.

It is not a de Polignac number, because 80726605049 - 2⁴ = 80726605033 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 80726604994 and 80726605012.

It is not a weakly prime, because it can be changed into another prime (80726605009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40363302524 + 40363302525.

It is an arithmetic number, because the mean of its divisors is an integer number (40363302525).

Almost surely, 2^80726605049 is an apocalyptic number.

It is an amenable number.

80726605049 is a deficient number, since it is larger than the sum of its proper divisors (1).

80726605049 is an equidigital number, since it uses as much as digits as its factorization.

80726605049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 725760, while the sum is 47.

The spelling of 80726605049 in words is "eighty billion, seven hundred twenty-six million, six hundred five thousand, forty-nine".