11273531556 has 96 divisors (see below), whose sum is σ = 30408763392. Its totient is φ = 3184070400.

The previous prime is 11273531551. The next prime is 11273531561. The reversal of 11273531556 is 65513537211.

It is an interprime number because it is at equal distance from previous prime (11273531551) and next prime (11273531561).

It is a super-2 number, since 2×11273531556² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11273531551) 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, 5400745 + ... + 5402831.

It is an arithmetic number, because the mean of its divisors is an integer number (316757952).

Almost surely, 2^11273531556 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 11273531556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15204381696).

11273531556 is an abundant number, since it is smaller than the sum of its proper divisors (19135231836).

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

11273531556 is a wasteful number, since it uses less digits than its factorization.

11273531556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2809 (or 2807 counting only the distinct ones).

The product of its digits is 94500, while the sum is 39.

The spelling of 11273531556 in words is "eleven billion, two hundred seventy-three million, five hundred thirty-one thousand, five hundred fifty-six".