91234405686 has 16 divisors (see below), whose sum is σ = 182503479024. Its totient is φ = 30405690624.

The previous prime is 91234405627. The next prime is 91234405729. The reversal of 91234405686 is 68650443219.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1410211 + ... + 1473486.

It is an arithmetic number, because the mean of its divisors is an integer number (11406467439).

Almost surely, 2^91234405686 is an apocalyptic number.

91234405686 is an abundant number, since it is smaller than the sum of its proper divisors (91269073338).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91234405686 is a wasteful number, since it uses less digits than its factorization.

91234405686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2888975.

The product of its (nonzero) digits is 1244160, while the sum is 48.

The spelling of 91234405686 in words is "ninety-one billion, two hundred thirty-four million, four hundred five thousand, six hundred eighty-six".