11581015116 has 48 divisors (see below), whose sum is σ = 29770852608. Its totient is φ = 3474648000.

The previous prime is 11581015099. The next prime is 11581015141. The reversal of 11581015116 is 61151018511.

It is a super-2 number, since 2×11581015116² (a number of 21 digits) contains 22 as substring.

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, 421000 + ... + 447663.

It is an arithmetic number, because the mean of its divisors is an integer number (620226096).

Almost surely, 2^11581015116 is an apocalyptic number.

It is an amenable number.

11581015116 is an abundant number, since it is smaller than the sum of its proper divisors (18189837492).

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

11581015116 is a wasteful number, since it uses less digits than its factorization.

11581015116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 868782 (or 868780 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 30.

The spelling of 11581015116 in words is "eleven billion, five hundred eighty-one million, fifteen thousand, one hundred sixteen".