11531150556 has 96 divisors (see below), whose sum is σ = 28884860928. Its totient is φ = 3571592640.

The previous prime is 11531150539. The next prime is 11531150573. The reversal of 11531150556 is 65505113511.

It is an interprime number because it is at equal distance from previous prime (11531150539) and next prime (11531150573).

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, 2264245 + ... + 2269331.

It is an arithmetic number, because the mean of its divisors is an integer number (300883968).

Almost surely, 2^11531150556 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11531150556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14442430464).

11531150556 is an abundant number, since it is smaller than the sum of its proper divisors (17353710372).

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

11531150556 is a wasteful number, since it uses less digits than its factorization.

11531150556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5351 (or 5349 counting only the distinct ones).

The product of its (nonzero) digits is 11250, while the sum is 33.

The spelling of 11531150556 in words is "eleven billion, five hundred thirty-one million, one hundred fifty thousand, five hundred fifty-six".