11180538580 has 48 divisors (see below), whose sum is σ = 24873394896. Its totient is φ = 4206919680.

The previous prime is 11180538571. The next prime is 11180538587. The reversal of 11180538580 is 8583508111.

It can be written as a sum of positive squares in 8 ways, for example, as 1228081936 + 9952456644 = 35044^2 + 99762^2 .

It is a super-3 number, since 3×11180538580³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11180538587) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 727132 + ... + 742348.

It is an arithmetic number, because the mean of its divisors is an integer number (518195727).

Almost surely, 2^11180538580 is an apocalyptic number.

11180538580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11180538580 is an abundant number, since it is smaller than the sum of its proper divisors (13692856316).

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

11180538580 is a wasteful number, since it uses less digits than its factorization.

11180538580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17404 (or 17402 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 40.

The spelling of 11180538580 in words is "eleven billion, one hundred eighty million, five hundred thirty-eight thousand, five hundred eighty".