91001011115 has 16 divisors (see below), whose sum is σ = 124833484800. Its totient is φ = 62384644320.

The previous prime is 91001011111. The next prime is 91001011133. The reversal of 91001011115 is 51111010019.

It is not a de Polignac number, because 91001011115 - 2² = 91001011111 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91001011111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 195515 + ... + 469284.

It is an arithmetic number, because the mean of its divisors is an integer number (7802092800).

Almost surely, 2^91001011115 is an apocalyptic number.

91001011115 is a deficient number, since it is larger than the sum of its proper divisors (33832473685).

91001011115 is a wasteful number, since it uses less digits than its factorization.

91001011115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668722.

The product of its (nonzero) digits is 45, while the sum is 20.

The spelling of 91001011115 in words is "ninety-one billion, one million, eleven thousand, one hundred fifteen".