90111122775 has 18 divisors (see below), whose sum is σ = 161399033640. Its totient is φ = 48059265360.

The previous prime is 90111122719. The next prime is 90111122819. The reversal of 90111122775 is 57722111109.

It is not a de Polignac number, because 90111122775 - 2¹⁴ = 90111106391 is a prime.

It is a super-2 number, since 2×90111122775² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 200246715 + ... + 200247164.

It is an arithmetic number, because the mean of its divisors is an integer number (8966612980).

Almost surely, 2^90111122775 is an apocalyptic number.

90111122775 is a deficient number, since it is larger than the sum of its proper divisors (71287910865).

90111122775 is a wasteful number, since it uses less digits than its factorization.

90111122775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400493895 (or 400493887 counting only the distinct ones).

The product of its (nonzero) digits is 8820, while the sum is 36.

The spelling of 90111122775 in words is "ninety billion, one hundred eleven million, one hundred twenty-two thousand, seven hundred seventy-five".