90344769666491 has 2 divisors, whose sum is σ = 90344769666492. Its totient is φ = 90344769666490.

The previous prime is 90344769666427. The next prime is 90344769666511. The reversal of 90344769666491 is 19466696744309.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90344769666491 - 2⁶ = 90344769666427 is a prime.

It is not a weakly prime, because it can be changed into another prime (90344769666391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45172384833245 + 45172384833246.

It is an arithmetic number, because the mean of its divisors is an integer number (45172384833246).

Almost surely, 2^{90344769666491} is an apocalyptic number.

90344769666491 is a deficient number, since it is larger than the sum of its proper divisors (1).

90344769666491 is an equidigital number, since it uses as much as digits as its factorization.

90344769666491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1269789696, while the sum is 74.

The spelling of 90344769666491 in words is "ninety trillion, three hundred forty-four billion, seven hundred sixty-nine million, six hundred sixty-six thousand, four hundred ninety-one".