91145279528 has 16 divisors (see below), whose sum is σ = 170970125760. Its totient is φ = 45553246000.

The previous prime is 91145279513. The next prime is 91145279551. The reversal of 91145279528 is 82597254119.

It is a self number, because there is not a number n which added to its sum of digits gives 91145279528.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2404238 + ... + 2441853.

It is an arithmetic number, because the mean of its divisors is an integer number (10685632860).

Almost surely, 2^91145279528 is an apocalyptic number.

It is an amenable number.

91145279528 is a deficient number, since it is larger than the sum of its proper divisors (79824846232).

91145279528 is a wasteful number, since it uses less digits than its factorization.

91145279528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4848448 (or 4848444 counting only the distinct ones).

The product of its digits is 1814400, while the sum is 53.

The spelling of 91145279528 in words is "ninety-one billion, one hundred forty-five million, two hundred seventy-nine thousand, five hundred twenty-eight".