11731559380 has 24 divisors (see below), whose sum is σ = 24638423040. Its totient is φ = 4692214560.

The previous prime is 11731559347. The next prime is 11731559383. The reversal of 11731559380 is 8395513711.

11731559380 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11731559383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 330285 + ... + 364075.

It is an arithmetic number, because the mean of its divisors is an integer number (1026600960).

Almost surely, 2^11731559380 is an apocalyptic number.

11731559380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11731559380 is an abundant number, since it is smaller than the sum of its proper divisors (12906863660).

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

11731559380 is a wasteful number, since it uses less digits than its factorization.

11731559380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51159 (or 51157 counting only the distinct ones).

The product of its (nonzero) digits is 113400, while the sum is 43.

The spelling of 11731559380 in words is "eleven billion, seven hundred thirty-one million, five hundred fifty-nine thousand, three hundred eighty".