91009284915 has 16 divisors (see below), whose sum is σ = 147250980000. Its totient is φ = 47992910592.

The previous prime is 91009284841. The next prime is 91009284917. The reversal of 91009284915 is 51948290019.

It is not a de Polignac number, because 91009284915 - 2⁸ = 91009284659 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91009284917) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 34084540 + ... + 34087209.

It is an arithmetic number, because the mean of its divisors is an integer number (9203186250).

Almost surely, 2^91009284915 is an apocalyptic number.

91009284915 is a deficient number, since it is larger than the sum of its proper divisors (56241695085).

91009284915 is a wasteful number, since it uses less digits than its factorization.

91009284915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68171846.

The product of its (nonzero) digits is 233280, while the sum is 48.

The spelling of 91009284915 in words is "ninety-one billion, nine million, two hundred eighty-four thousand, nine hundred fifteen".