91385047236 has 144 divisors (see below), whose sum is σ = 249525202752. Its totient is φ = 25954790400.

The previous prime is 91385047223. The next prime is 91385047249. The reversal of 91385047236 is 63274058319.

It is an interprime number because it is at equal distance from previous prime (91385047223) and next prime (91385047249).

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 47 ways as a sum of consecutive naturals, for example, 120085096 + ... + 120085856.

It is an arithmetic number, because the mean of its divisors is an integer number (1732813908).

It is a 1-persistent number, because it is pandigital, but 2⋅91385047236 = 182770094472 is not.

Almost surely, 2^91385047236 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91385047236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124762601376).

91385047236 is an abundant number, since it is smaller than the sum of its proper divisors (158140155516).

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

91385047236 is a wasteful number, since it uses less digits than its factorization.

91385047236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1730 (or 1721 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 48.

The spelling of 91385047236 in words is "ninety-one billion, three hundred eighty-five million, forty-seven thousand, two hundred thirty-six".