11539891940 has 24 divisors (see below), whose sum is σ = 24797351040. Its totient is φ = 4508608608.

The previous prime is 11539891933. The next prime is 11539891943. The reversal of 11539891940 is 4919893511.

It is not an unprimeable number, because it can be changed into a prime (11539891943) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 6708380 + ... + 6710099.

It is an arithmetic number, because the mean of its divisors is an integer number (1033222960).

Almost surely, 2^11539891940 is an apocalyptic number.

11539891940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11539891940 is an abundant number, since it is smaller than the sum of its proper divisors (13257459100).

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

11539891940 is a wasteful number, since it uses less digits than its factorization.

11539891940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13418531 (or 13418529 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 50.

The spelling of 11539891940 in words is "eleven billion, five hundred thirty-nine million, eight hundred ninety-one thousand, nine hundred forty".