11986509602 has 8 divisors (see below), whose sum is σ = 18144716700. Its totient is φ = 5938270704.

The previous prime is 11986509539. The next prime is 11986509629. The reversal of 11986509602 is 20690568911.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 9348762721 + 2637746881 = 96689^2 + 51359^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27491777 + ... + 27492212.

Almost surely, 2^11986509602 is an apocalyptic number.

11986509602 is a deficient number, since it is larger than the sum of its proper divisors (6158207098).

11986509602 is a wasteful number, since it uses less digits than its factorization.

11986509602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54984100.

The product of its (nonzero) digits is 233280, while the sum is 47.

The spelling of 11986509602 in words is "eleven billion, nine hundred eighty-six million, five hundred nine thousand, six hundred two".