90910091011 has 16 divisors (see below), whose sum is σ = 95408352000. Its totient is φ = 86521392000.

The previous prime is 90910091003. The next prime is 90910091017. The reversal of 90910091011 is 11019001909.

It is a cyclic number.

It is not a de Polignac number, because 90910091011 - 2³ = 90910091003 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90910091017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 369085 + ... + 563953.

It is an arithmetic number, because the mean of its divisors is an integer number (5963022000).

Almost surely, 2^90910091011 is an apocalyptic number.

90910091011 is a deficient number, since it is larger than the sum of its proper divisors (4498260989).

90910091011 is a wasteful number, since it uses less digits than its factorization.

90910091011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195150.

The product of its (nonzero) digits is 729, while the sum is 31.

The spelling of 90910091011 in words is "ninety billion, nine hundred ten million, ninety-one thousand, eleven".