91291977340 has 12 divisors (see below), whose sum is σ = 191713152456. Its totient is φ = 36516790928.

The previous prime is 91291977323. The next prime is 91291977377. The reversal of 91291977340 is 4377919219.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2282299414 + ... + 2282299453.

It is an arithmetic number, because the mean of its divisors is an integer number (15976096038).

Almost surely, 2^91291977340 is an apocalyptic number.

It is an amenable number.

91291977340 is an abundant number, since it is smaller than the sum of its proper divisors (100421175116).

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

91291977340 is a wasteful number, since it uses less digits than its factorization.

91291977340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4564598876 (or 4564598874 counting only the distinct ones).

The product of its (nonzero) digits is 857304, while the sum is 52.

The spelling of 91291977340 in words is "ninety-one billion, two hundred ninety-one million, nine hundred seventy-seven thousand, three hundred forty".