90918071111 has 6 divisors (see below), whose sum is σ = 105761837880. Its totient is φ = 77929775196.

The previous prime is 90918071063. The next prime is 90918071131. The reversal of 90918071111 is 11117081909.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-90918071111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90918071131) 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 5 ways as a sum of consecutive naturals, for example, 927735371 + ... + 927735468.

It is an arithmetic number, because the mean of its divisors is an integer number (17626972980).

Almost surely, 2^90918071111 is an apocalyptic number.

90918071111 is a deficient number, since it is larger than the sum of its proper divisors (14843766769).

90918071111 is a wasteful number, since it uses less digits than its factorization.

90918071111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1855470853 (or 1855470846 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 38.

The spelling of 90918071111 in words is "ninety billion, nine hundred eighteen million, seventy-one thousand, one hundred eleven".