90856936601 has 2 divisors, whose sum is σ = 90856936602. Its totient is φ = 90856936600.

The previous prime is 90856936591. The next prime is 90856936609. The reversal of 90856936601 is 10663965809.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75100662025 + 15756274576 = 274045^2 + 125524^2 .

It is a cyclic number.

It is not a de Polignac number, because 90856936601 - 2¹⁰ = 90856935577 is a prime.

It is not a weakly prime, because it can be changed into another prime (90856936609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45428468300 + 45428468301.

It is an arithmetic number, because the mean of its divisors is an integer number (45428468301).

Almost surely, 2^90856936601 is an apocalyptic number.

It is an amenable number.

90856936601 is a deficient number, since it is larger than the sum of its proper divisors (1).

90856936601 is an equidigital number, since it uses as much as digits as its factorization.

90856936601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2099520, while the sum is 53.

The spelling of 90856936601 in words is "ninety billion, eight hundred fifty-six million, nine hundred thirty-six thousand, six hundred one".