91440471825480 has 128 divisors (see below), whose sum is σ = 284290261401600. Its totient is φ = 23501025364992.

The previous prime is 91440471825427. The next prime is 91440471825481. The reversal of 91440471825480 is 8452817404419.

It is a super-2 number, since 2×91440471825480² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 91440471825480.

It is not an unprimeable number, because it can be changed into a prime (91440471825481) 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, 21648712 + ... + 25525431.

It is an arithmetic number, because the mean of its divisors is an integer number (2221017667200).

Almost surely, 2^{91440471825480} is an apocalyptic number.

It is an amenable number.

91440471825480 is an abundant number, since it is smaller than the sum of its proper divisors (192849789576120).

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

91440471825480 is a wasteful number, since it uses less digits than its factorization.

91440471825480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47174743 (or 47174739 counting only the distinct ones).

The product of its (nonzero) digits is 10321920, while the sum is 57.

The spelling of 91440471825480 in words is "ninety-one trillion, four hundred forty billion, four hundred seventy-one million, eight hundred twenty-five thousand, four hundred eighty".