91001001115 has 16 divisors (see below), whose sum is σ = 113191600896. Its totient is φ = 70160025600.

The previous prime is 91001001101. The next prime is 91001001121. The reversal of 91001001115 is 51110010019.

It is not a de Polignac number, because 91001001115 - 2⁵ = 91001001083 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91001001092 and 91001001101.

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, 1180702 + ... + 1255411.

It is an arithmetic number, because the mean of its divisors is an integer number (7074475056).

Almost surely, 2^91001001115 is an apocalyptic number.

91001001115 is a deficient number, since it is larger than the sum of its proper divisors (22190599781).

91001001115 is a wasteful number, since it uses less digits than its factorization.

91001001115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2436390.

The product of its (nonzero) digits is 45, while the sum is 19.

The spelling of 91001001115 in words is "ninety-one billion, one million, one thousand, one hundred fifteen".