11161143552 has 288 divisors, whose sum is σ = 35664693120. Its totient is φ = 3061186560.

The previous prime is 11161143509. The next prime is 11161143557. The reversal of 11161143552 is 25534116111.

It is a super-2 number, since 2×11161143552² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11161143557) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3223102 + ... + 3226562.

It is an arithmetic number, because the mean of its divisors is an integer number (123835740).

Almost surely, 2^11161143552 is an apocalyptic number.

11161143552 is a gapful number since it is divisible by the number (12) 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 11161143552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17832346560).

11161143552 is an abundant number, since it is smaller than the sum of its proper divisors (24503549568).

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

11161143552 is a wasteful number, since it uses less digits than its factorization.

11161143552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3529 (or 3515 counting only the distinct ones).

The product of its digits is 3600, while the sum is 30.

Adding to 11161143552 its reverse (25534116111), we get a palindrome (36695259663).

The spelling of 11161143552 in words is "eleven billion, one hundred sixty-one million, one hundred forty-three thousand, five hundred fifty-two".