91286209338 has 32 divisors (see below), whose sum is σ = 189911554560. Its totient is φ = 29217142080.

The previous prime is 91286209297. The next prime is 91286209363. The reversal of 91286209338 is 83390268219.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1417770 + ... + 1480757.

It is an arithmetic number, because the mean of its divisors is an integer number (5934736080).

Almost surely, 2^91286209338 is an apocalyptic number.

91286209338 is an abundant number, since it is smaller than the sum of its proper divisors (98625345222).

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

91286209338 is a wasteful number, since it uses less digits than its factorization.

91286209338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2898742.

The product of its (nonzero) digits is 1119744, while the sum is 51.

The spelling of 91286209338 in words is "ninety-one billion, two hundred eighty-six million, two hundred nine thousand, three hundred thirty-eight".