90806367771 has 48 divisors (see below), whose sum is σ = 153056113600. Its totient is φ = 51857366400.

The previous prime is 90806367749. The next prime is 90806367779. The reversal of 90806367771 is 17776360809.

It is not a de Polignac number, because 90806367771 - 2²⁷ = 90672150043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90806367779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5551521 + ... + 5567853.

Almost surely, 2^90806367771 is an apocalyptic number.

90806367771 is a deficient number, since it is larger than the sum of its proper divisors (62249745829).

90806367771 is a wasteful number, since it uses less digits than its factorization.

90806367771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18161 (or 18144 counting only the distinct ones).

The product of its (nonzero) digits is 2667168, while the sum is 54.

The spelling of 90806367771 in words is "ninety billion, eight hundred six million, three hundred sixty-seven thousand, seven hundred seventy-one".