91136847873 has 8 divisors (see below), whose sum is σ = 121718664000. Its totient is φ = 60656465168.

The previous prime is 91136847869. The next prime is 91136847913. The reversal of 91136847873 is 37874863119.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91136847873 - 2² = 91136847869 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91136847803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25356258 + ... + 25359851.

It is an arithmetic number, because the mean of its divisors is an integer number (15214833000).

Almost surely, 2^91136847873 is an apocalyptic number.

It is an amenable number.

91136847873 is a deficient number, since it is larger than the sum of its proper divisors (30581816127).

91136847873 is a wasteful number, since it uses less digits than its factorization.

91136847873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50716711.

The product of its digits is 6096384, while the sum is 57.

The spelling of 91136847873 in words is "ninety-one billion, one hundred thirty-six million, eight hundred forty-seven thousand, eight hundred seventy-three".