90434664658831 has 2 divisors, whose sum is σ = 90434664658832. Its totient is φ = 90434664658830.

The previous prime is 90434664658777. The next prime is 90434664658853. The reversal of 90434664658831 is 13885646643409.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90434664658831 - 2²⁷ = 90434530441103 is a prime.

It is a super-2 number, since 2×90434664658831² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90434664652831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45217332329415 + 45217332329416.

It is an arithmetic number, because the mean of its divisors is an integer number (45217332329416).

Almost surely, 2^{90434664658831} is an apocalyptic number.

90434664658831 is a deficient number, since it is larger than the sum of its proper divisors (1).

90434664658831 is an equidigital number, since it uses as much as digits as its factorization.

90434664658831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 358318080, while the sum is 67.

The spelling of 90434664658831 in words is "ninety trillion, four hundred thirty-four billion, six hundred sixty-four million, six hundred fifty-eight thousand, eight hundred thirty-one".