11517159840 has 96 divisors (see below), whose sum is σ = 37856439936. Its totient is φ = 2937707520.

The previous prime is 11517159809. The next prime is 11517159883. The reversal of 11517159840 is 4895171511.

It is a tau number, because it is divible by the number of its divisors (96).

It is a junction number, because it is equal to n+sod(n) for n = 11517159792 and 11517159801.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 510571 + ... + 532650.

It is an arithmetic number, because the mean of its divisors is an integer number (394337916).

Almost surely, 2^11517159840 is an apocalyptic number.

11517159840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11517159840 is an abundant number, since it is smaller than the sum of its proper divisors (26339280096).

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

11517159840 is a wasteful number, since it uses less digits than its factorization.

11517159840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1043262 (or 1043254 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 42.

The spelling of 11517159840 in words is "eleven billion, five hundred seventeen million, one hundred fifty-nine thousand, eight hundred forty".