91565507484 has 288 divisors, whose sum is σ = 277385472000. Its totient is φ = 26119661760.

The previous prime is 91565507479. The next prime is 91565507507. The reversal of 91565507484 is 48470556519.

It is a happy number.

91565507484 is a `hidden beast` number, since 9 + 1 + 5 + 6 + 550 + 7 + 4 + 84 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 91565507484.

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 95 ways as a sum of consecutive naturals, for example, 33924367 + ... + 33927065.

It is an arithmetic number, because the mean of its divisors is an integer number (963144000).

Almost surely, 2^91565507484 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 91565507484, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138692736000).

91565507484 is an abundant number, since it is smaller than the sum of its proper divisors (185819964516).

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

91565507484 is a wasteful number, since it uses less digits than its factorization.

91565507484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2915 (or 2901 counting only the distinct ones).

The product of its (nonzero) digits is 6048000, while the sum is 54.

The spelling of 91565507484 in words is "ninety-one billion, five hundred sixty-five million, five hundred seven thousand, four hundred eighty-four".