1185543564 has 12 divisors (see below), whose sum is σ = 2766268344. Its totient is φ = 395181184.

The previous prime is 1185543563. The next prime is 1185543607. The reversal of 1185543564 is 4653455811.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (1185543563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49397637 + ... + 49397660.

It is an arithmetic number, because the mean of its divisors is an integer number (230522362).

Almost surely, 2^1185543564 is an apocalyptic number.

It is an amenable number.

1185543564 is an abundant number, since it is smaller than the sum of its proper divisors (1580724780).

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

1185543564 is a wasteful number, since it uses less digits than its factorization.

1185543564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98795304 (or 98795302 counting only the distinct ones).

The product of its digits is 288000, while the sum is 42.

The square root of 1185543564 is about 34431.7232214712. The cubic root of 1185543564 is about 1058.3740242744.

The spelling of 1185543564 in words is "one billion, one hundred eighty-five million, five hundred forty-three thousand, five hundred sixty-four".