90778923258341 has 2 divisors, whose sum is σ = 90778923258342. Its totient is φ = 90778923258340.

The previous prime is 90778923258293. The next prime is 90778923258371. The reversal of 90778923258341 is 14385232987709.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61589864022241 + 29189059236100 = 7847921^2 + 5402690^2 .

It is a cyclic number.

It is not a de Polignac number, because 90778923258341 - 2²² = 90778919064037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90778923258371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45389461629170 + 45389461629171.

It is an arithmetic number, because the mean of its divisors is an integer number (45389461629171).

Almost surely, 2^{90778923258341} is an apocalyptic number.

It is an amenable number.

90778923258341 is a deficient number, since it is larger than the sum of its proper divisors (1).

90778923258341 is an equidigital number, since it uses as much as digits as its factorization.

90778923258341 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 182891520, while the sum is 68.

The spelling of 90778923258341 in words is "ninety trillion, seven hundred seventy-eight billion, nine hundred twenty-three million, two hundred fifty-eight thousand, three hundred forty-one".