91285101440512 has 80 divisors (see below), whose sum is σ = 212701938213600. Its totient is φ = 39122186256384.

The previous prime is 91285101440501. The next prime is 91285101440557. The reversal of 91285101440512 is 21504410158219.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 259724113 + ... + 260075344.

It is an arithmetic number, because the mean of its divisors is an integer number (2658774227670).

Almost surely, 2^{91285101440512} is an apocalyptic number.

It is an amenable number.

91285101440512 is an abundant number, since it is smaller than the sum of its proper divisors (121416836773088).

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

91285101440512 is an frugal number, since it uses more digits than its factorization.

91285101440512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519799496 (or 519799466 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 43.

The spelling of 91285101440512 in words is "ninety-one trillion, two hundred eighty-five billion, one hundred one million, four hundred forty thousand, five hundred twelve".