91850797586 has 16 divisors (see below), whose sum is σ = 138913104600. Its totient is φ = 45547063680.

The previous prime is 91850797567. The next prime is 91850797631. The reversal of 91850797586 is 68579705819.

It can be written as a sum of positive squares in 4 ways, for example, as 79436604025 + 12414193561 = 281845^2 + 111419^2 .

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 in 7 ways as a sum of consecutive naturals, for example, 132740 + ... + 448688.

Almost surely, 2^91850797586 is an apocalyptic number.

91850797586 is a deficient number, since it is larger than the sum of its proper divisors (47062307014).

91850797586 is a wasteful number, since it uses less digits than its factorization.

91850797586 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317149.

The product of its (nonzero) digits is 38102400, while the sum is 65.

The spelling of 91850797586 in words is "ninety-one billion, eight hundred fifty million, seven hundred ninety-seven thousand, five hundred eighty-six".