90015302681 has 2 divisors, whose sum is σ = 90015302682. Its totient is φ = 90015302680.

The previous prime is 90015302647. The next prime is 90015302701. The reversal of 90015302681 is 18620351009.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77220073225 + 12795229456 = 277885^2 + 113116^2 .

It is a cyclic number.

It is not a de Polignac number, because 90015302681 - 2¹⁰ = 90015301657 is a prime.

It is a super-2 number, since 2×90015302681² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (90015302581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45007651340 + 45007651341.

It is an arithmetic number, because the mean of its divisors is an integer number (45007651341).

Almost surely, 2^90015302681 is an apocalyptic number.

It is an amenable number.

90015302681 is a deficient number, since it is larger than the sum of its proper divisors (1).

90015302681 is an equidigital number, since it uses as much as digits as its factorization.

90015302681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 35.

The spelling of 90015302681 in words is "ninety billion, fifteen million, three hundred two thousand, six hundred eighty-one".