9765091421081 has 2 divisors, whose sum is σ = 9765091421082. Its totient is φ = 9765091421080.

The previous prime is 9765091421027. The next prime is 9765091421149. The reversal of 9765091421081 is 1801241905679.

9765091421081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6778212250000 + 2986879171081 = 2603500^2 + 1728259^2 .

It is a cyclic number.

It is not a de Polignac number, because 9765091421081 - 2²⁶ = 9765024312217 is a prime.

It is a super-2 number, since 2×9765091421081² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9765091420081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4882545710540 + 4882545710541.

It is an arithmetic number, because the mean of its divisors is an integer number (4882545710541).

Almost surely, 2^{9765091421081} is an apocalyptic number.

It is an amenable number.

9765091421081 is a deficient number, since it is larger than the sum of its proper divisors (1).

9765091421081 is an equidigital number, since it uses as much as digits as its factorization.

9765091421081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1088640, while the sum is 53.

The spelling of 9765091421081 in words is "nine trillion, seven hundred sixty-five billion, ninety-one million, four hundred twenty-one thousand, eighty-one".