11185215540 has 24 divisors (see below), whose sum is σ = 31318603680. Its totient is φ = 2982724128.

The previous prime is 11185215473. The next prime is 11185215541. The reversal of 11185215540 is 4551258111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11185215541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93210070 + ... + 93210189.

It is an arithmetic number, because the mean of its divisors is an integer number (1304941820).

Almost surely, 2^11185215540 is an apocalyptic number.

11185215540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11185215540 is an abundant number, since it is smaller than the sum of its proper divisors (20133388140).

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

11185215540 is a wasteful number, since it uses less digits than its factorization.

11185215540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186420271 (or 186420269 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 33.

The spelling of 11185215540 in words is "eleven billion, one hundred eighty-five million, two hundred fifteen thousand, five hundred forty".