91286813361 has 8 divisors (see below), whose sum is σ = 121718963520. Its totient is φ = 60856269392.

The previous prime is 91286813353. The next prime is 91286813411. The reversal of 91286813361 is 16331868219.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91286813361 - 2³ = 91286813353 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91286813361.

It is not an unprimeable number, because it can be changed into a prime (91286813161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 262005 + ... + 501218.

It is an arithmetic number, because the mean of its divisors is an integer number (15214870440).

Almost surely, 2^91286813361 is an apocalyptic number.

It is an amenable number.

91286813361 is a deficient number, since it is larger than the sum of its proper divisors (30432150159).

91286813361 is a wasteful number, since it uses less digits than its factorization.

91286813361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 803095.

The product of its digits is 373248, while the sum is 48.

The spelling of 91286813361 in words is "ninety-one billion, two hundred eighty-six million, eight hundred thirteen thousand, three hundred sixty-one".