90886638901 has 2 divisors, whose sum is σ = 90886638902. Its totient is φ = 90886638900.

The previous prime is 90886638881. The next prime is 90886638917. The reversal of 90886638901 is 10983668809.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87820359025 + 3066279876 = 296345^2 + 55374^2 .

It is a cyclic number.

It is not a de Polignac number, because 90886638901 - 2³⁵ = 56526900533 is a prime.

It is a super-2 number, since 2×90886638901² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90886638971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45443319450 + 45443319451.

It is an arithmetic number, because the mean of its divisors is an integer number (45443319451).

Almost surely, 2^90886638901 is an apocalyptic number.

It is an amenable number.

90886638901 is a deficient number, since it is larger than the sum of its proper divisors (1).

90886638901 is an equidigital number, since it uses as much as digits as its factorization.

90886638901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4478976, while the sum is 58.

The spelling of 90886638901 in words is "ninety billion, eight hundred eighty-six million, six hundred thirty-eight thousand, nine hundred one".