91088087742 has 24 divisors (see below), whose sum is σ = 197753049000. Its totient is φ = 30301845840.

The previous prime is 91088087737. The next prime is 91088087759. The reversal of 91088087742 is 24778088019.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5061609 + ... + 5079572.

It is an arithmetic number, because the mean of its divisors is an integer number (8239710375).

Almost surely, 2^91088087742 is an apocalyptic number.

91088087742 is an abundant number, since it is smaller than the sum of its proper divisors (106664961258).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91088087742 is a wasteful number, since it uses less digits than its factorization.

91088087742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10141688 (or 10141685 counting only the distinct ones).

The product of its (nonzero) digits is 1806336, while the sum is 54.

The spelling of 91088087742 in words is "ninety-one billion, eighty-eight million, eighty-seven thousand, seven hundred forty-two".