91068090238 has 4 divisors (see below), whose sum is σ = 136602135360. Its totient is φ = 45534045118.

The previous prime is 91068090221. The next prime is 91068090251. The reversal of 91068090238 is 83209086019.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 22767022558 + ... + 22767022561.

It is an arithmetic number, because the mean of its divisors is an integer number (34150533840).

Almost surely, 2^91068090238 is an apocalyptic number.

91068090238 is a deficient number, since it is larger than the sum of its proper divisors (45534045122).

91068090238 is a wasteful number, since it uses less digits than its factorization.

91068090238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45534045121.

The product of its (nonzero) digits is 186624, while the sum is 46.

The spelling of 91068090238 in words is "ninety-one billion, sixty-eight million, ninety thousand, two hundred thirty-eight".