90421170796601 has 2 divisors, whose sum is σ = 90421170796602. Its totient is φ = 90421170796600.

The previous prime is 90421170796597. The next prime is 90421170796751. The reversal of 90421170796601 is 10669707112409.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57550430440000 + 32870740356601 = 7586200^2 + 5733301^2 .

It is a cyclic number.

It is not a de Polignac number, because 90421170796601 - 2² = 90421170796597 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (90421170798601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45210585398300 + 45210585398301.

It is an arithmetic number, because the mean of its divisors is an integer number (45210585398301).

Almost surely, 2^{90421170796601} is an apocalyptic number.

It is an amenable number.

90421170796601 is a deficient number, since it is larger than the sum of its proper divisors (1).

90421170796601 is an equidigital number, since it uses as much as digits as its factorization.

90421170796601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1143072, while the sum is 53.

The spelling of 90421170796601 in words is "ninety trillion, four hundred twenty-one billion, one hundred seventy million, seven hundred ninety-six thousand, six hundred one".