11151215442 has 96 divisors (see below), whose sum is σ = 25619742720. Its totient is φ = 3498374880.

The previous prime is 11151215431. The next prime is 11151215443. The reversal of 11151215442 is 24451215111.

11151215442 is a `hidden beast` number, since 1 + 1 + 1 + 5 + 1 + 215 + 442 = 666.

It is not an unprimeable number, because it can be changed into a prime (11151215443) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6886909 + ... + 6888527.

It is an arithmetic number, because the mean of its divisors is an integer number (266872320).

Almost surely, 2^11151215442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11151215442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12809871360).

11151215442 is an abundant number, since it is smaller than the sum of its proper divisors (14468527278).

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

11151215442 is a wasteful number, since it uses less digits than its factorization.

11151215442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1908 (or 1905 counting only the distinct ones).

The product of its digits is 1600, while the sum is 27.

The spelling of 11151215442 in words is "eleven billion, one hundred fifty-one million, two hundred fifteen thousand, four hundred forty-two".