9157430779121 has 2 divisors, whose sum is σ = 9157430779122. Its totient is φ = 9157430779120.

The previous prime is 9157430779099. The next prime is 9157430779127. The reversal of 9157430779121 is 1219770347519.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9050951910400 + 106478868721 = 3008480^2 + 326311^2 .

It is a cyclic number.

It is not a de Polignac number, because 9157430779121 - 2³⁸ = 8882552872177 is a prime.

It is not a weakly prime, because it can be changed into another prime (9157430779127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4578715389560 + 4578715389561.

It is an arithmetic number, because the mean of its divisors is an integer number (4578715389561).

Almost surely, 2^{9157430779121} is an apocalyptic number.

It is an amenable number.

9157430779121 is a deficient number, since it is larger than the sum of its proper divisors (1).

9157430779121 is an equidigital number, since it uses as much as digits as its factorization.

9157430779121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3333960, while the sum is 56.

The spelling of 9157430779121 in words is "nine trillion, one hundred fifty-seven billion, four hundred thirty million, seven hundred seventy-nine thousand, one hundred twenty-one".