91871802246 has 64 divisors (see below), whose sum is σ = 211031682048. Its totient is φ = 26119446528.

The previous prime is 91871802241. The next prime is 91871802313. The reversal of 91871802246 is 64220817819.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 91871802195 and 91871802204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91871802241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10787686 + ... + 10796198.

It is an arithmetic number, because the mean of its divisors is an integer number (3297370032).

Almost surely, 2^91871802246 is an apocalyptic number.

91871802246 is an abundant number, since it is smaller than the sum of its proper divisors (119159879802).

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

91871802246 is a wasteful number, since it uses less digits than its factorization.

91871802246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9765.

The product of its (nonzero) digits is 387072, while the sum is 48.

The spelling of 91871802246 in words is "ninety-one billion, eight hundred seventy-one million, eight hundred two thousand, two hundred forty-six".