90919818894259 has 2 divisors, whose sum is σ = 90919818894260. Its totient is φ = 90919818894258.

The previous prime is 90919818894241. The next prime is 90919818894269. The reversal of 90919818894259 is 95249881891909.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90919818894259 - 2⁷ = 90919818894131 is a prime.

It is not a weakly prime, because it can be changed into another prime (90919818894269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45459909447129 + 45459909447130.

It is an arithmetic number, because the mean of its divisors is an integer number (45459909447130).

Almost surely, 2^{90919818894259} is an apocalyptic number.

90919818894259 is a deficient number, since it is larger than the sum of its proper divisors (1).

90919818894259 is an equidigital number, since it uses as much as digits as its factorization.

90919818894259 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1209323520, while the sum is 82.

The spelling of 90919818894259 in words is "ninety trillion, nine hundred nineteen billion, eight hundred eighteen million, eight hundred ninety-four thousand, two hundred fifty-nine".