11543871840 has 192 divisors, whose sum is σ = 36984729600. Its totient is φ = 3026110464.

The previous prime is 11543871839. The next prime is 11543871851. The reversal of 11543871840 is 4817834511.

It is a junction number, because it is equal to n+sod(n) for n = 11543871792 and 11543871801.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11110041 + ... + 11111079.

It is an arithmetic number, because the mean of its divisors is an integer number (192628800).

Almost surely, 2^11543871840 is an apocalyptic number.

11543871840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11543871840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18492364800).

11543871840 is an abundant number, since it is smaller than the sum of its proper divisors (25440857760).

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

11543871840 is a wasteful number, since it uses less digits than its factorization.

11543871840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1429 (or 1421 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 42.

The spelling of 11543871840 in words is "eleven billion, five hundred forty-three million, eight hundred seventy-one thousand, eight hundred forty".