11591239809440 has 48 divisors (see below), whose sum is σ = 27714235455648. Its totient is φ = 4580634521856.

The previous prime is 11591239809353. The next prime is 11591239809449. The reversal of 11591239809440 is 4490893219511.

11591239809440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×11591239809440² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11591239809449) 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, 436403882 + ... + 436430441.

It is an arithmetic number, because the mean of its divisors is an integer number (577379905326).

Almost surely, 2^{11591239809440} is an apocalyptic number.

11591239809440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11591239809440 is an abundant number, since it is smaller than the sum of its proper divisors (16122995646208).

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

11591239809440 is an equidigital number, since it uses as much as digits as its factorization.

11591239809440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 872834421 (or 872834413 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 56.

The spelling of 11591239809440 in words is "eleven trillion, five hundred ninety-one billion, two hundred thirty-nine million, eight hundred nine thousand, four hundred forty".