90812464332881 has 2 divisors, whose sum is σ = 90812464332882. Its totient is φ = 90812464332880.

The previous prime is 90812464332871. The next prime is 90812464332899. The reversal of 90812464332881 is 18823346421809.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45592420910656 + 45220043422225 = 6752216^2 + 6724585^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90812464332881 is a prime.

It is a super-2 number, since 2×90812464332881² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 90812464332881.

It is not a weakly prime, because it can be changed into another prime (90812464332871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45406232166440 + 45406232166441.

It is an arithmetic number, because the mean of its divisors is an integer number (45406232166441).

Almost surely, 2^{90812464332881} is an apocalyptic number.

It is an amenable number.

90812464332881 is a deficient number, since it is larger than the sum of its proper divisors (1).

90812464332881 is an equidigital number, since it uses as much as digits as its factorization.

90812464332881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15925248, while the sum is 59.

The spelling of 90812464332881 in words is "ninety trillion, eight hundred twelve billion, four hundred sixty-four million, three hundred thirty-two thousand, eight hundred eighty-one".