91459095440 has 40 divisors (see below), whose sum is σ = 216246516480. Its totient is φ = 35963574656.

The previous prime is 91459095421. The next prime is 91459095443. The reversal of 91459095440 is 4459095419.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×91459095440² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (91459095443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9683744 + ... + 9693183.

It is an arithmetic number, because the mean of its divisors is an integer number (5406162912).

Almost surely, 2^91459095440 is an apocalyptic number.

It is an amenable number.

91459095440 is an abundant number, since it is smaller than the sum of its proper divisors (124787421040).

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

91459095440 is a wasteful number, since it uses less digits than its factorization.

91459095440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19376999 (or 19376993 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 50.

The spelling of 91459095440 in words is "ninety-one billion, four hundred fifty-nine million, ninety-five thousand, four hundred forty".