91011010910 has 16 divisors (see below), whose sum is σ = 163823274576. Its totient is φ = 36403636608.

The previous prime is 91011010907. The next prime is 91011010949. The reversal of 91011010910 is 1901011019.

It is a happy number.

It is a Curzon number.

It is a congruent number.

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, 802022 + ... + 908438.

It is an arithmetic number, because the mean of its divisors is an integer number (10238954661).

Almost surely, 2^91011010910 is an apocalyptic number.

91011010910 is a deficient number, since it is larger than the sum of its proper divisors (72812263666).

91011010910 is a wasteful number, since it uses less digits than its factorization.

91011010910 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191947.

The product of its (nonzero) digits is 81, while the sum is 23.

Adding to 91011010910 its reverse (1901011019), we get a palindrome (92912021929).

The spelling of 91011010910 in words is "ninety-one billion, eleven million, ten thousand, nine hundred ten".