11861653652 has 24 divisors (see below), whose sum is σ = 20813023560. Its totient is φ = 5915099520.

The previous prime is 11861653619. The next prime is 11861653691. The reversal of 11861653652 is 25635616811.

It can be written as a sum of positive squares in 4 ways, for example, as 4811364496 + 7050289156 = 69364^2 + 83966^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2720258 + ... + 2724614.

It is an arithmetic number, because the mean of its divisors is an integer number (867209315).

Almost surely, 2^11861653652 is an apocalyptic number.

It is an amenable number.

11861653652 is a deficient number, since it is larger than the sum of its proper divisors (8951369908).

11861653652 is a wasteful number, since it uses less digits than its factorization.

11861653652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6011 (or 6009 counting only the distinct ones).

The product of its digits is 259200, while the sum is 44.

The spelling of 11861653652 in words is "eleven billion, eight hundred sixty-one million, six hundred fifty-three thousand, six hundred fifty-two".