11220538560 has 448 divisors, whose sum is σ = 47033809920. Its totient is φ = 2194145280.

The previous prime is 11220538499. The next prime is 11220538573. The reversal of 11220538560 is 6583502211.

It is a tau number, because it is divible by the number of its divisors (448).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1252176 + ... + 1261104.

Almost surely, 2^11220538560 is an apocalyptic number.

11220538560 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 11220538560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23516904960).

11220538560 is an abundant number, since it is smaller than the sum of its proper divisors (35813271360).

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

11220538560 is a wasteful number, since it uses less digits than its factorization.

11220538560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8984 (or 8974 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 33.

The spelling of 11220538560 in words is "eleven billion, two hundred twenty million, five hundred thirty-eight thousand, five hundred sixty".