90992811911 has 4 divisors (see below), whose sum is σ = 90993536952. Its totient is φ = 90992086872.

The previous prime is 90992811893. The next prime is 90992811953. The reversal of 90992811911 is 11911829909.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90992811911 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 90992811911.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90992811311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120341 + ... + 443246.

It is an arithmetic number, because the mean of its divisors is an integer number (22748384238).

Almost surely, 2^90992811911 is an apocalyptic number.

90992811911 is a deficient number, since it is larger than the sum of its proper divisors (725041).

90992811911 is a wasteful number, since it uses less digits than its factorization.

90992811911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725040.

The product of its (nonzero) digits is 104976, while the sum is 50.

The spelling of 90992811911 in words is "ninety billion, nine hundred ninety-two million, eight hundred eleven thousand, nine hundred eleven".