11216531540 has 48 divisors (see below), whose sum is σ = 24147353664. Its totient is φ = 4373894400.

The previous prime is 11216531527. The next prime is 11216531561. The reversal of 11216531540 is 4513561211.

It is a congruent number.

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, 1283867 + ... + 1292573.

It is an arithmetic number, because the mean of its divisors is an integer number (503069868).

Almost surely, 2^11216531540 is an apocalyptic number.

11216531540 is a gapful number since it is divisible by the number (10) 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 11216531540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12073676832).

11216531540 is an abundant number, since it is smaller than the sum of its proper divisors (12930822124).

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

11216531540 is a wasteful number, since it uses less digits than its factorization.

11216531540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10328 (or 10326 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 29.

The spelling of 11216531540 in words is "eleven billion, two hundred sixteen million, five hundred thirty-one thousand, five hundred forty".