90094613231881 has 2 divisors, whose sum is σ = 90094613231882. Its totient is φ = 90094613231880.

The previous prime is 90094613231827. The next prime is 90094613232053. The reversal of 90094613231881 is 18813231649009.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79861389710400 + 10233223521481 = 8936520^2 + 3198941^2 .

It is a cyclic number.

It is not a de Polignac number, because 90094613231881 - 2³⁵ = 90060253493513 is a prime.

It is a super-2 number, since 2×90094613231881² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (90094613238881) 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, 45047306615940 + 45047306615941.

It is an arithmetic number, because the mean of its divisors is an integer number (45047306615941).

Almost surely, 2^{90094613231881} is an apocalyptic number.

It is an amenable number.

90094613231881 is a deficient number, since it is larger than the sum of its proper divisors (1).

90094613231881 is an equidigital number, since it uses as much as digits as its factorization.

90094613231881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2239488, while the sum is 55.

The spelling of 90094613231881 in words is "ninety trillion, ninety-four billion, six hundred thirteen million, two hundred thirty-one thousand, eight hundred eighty-one".