12331661436 has 18 divisors (see below), whose sum is σ = 31171699832. Its totient is φ = 4110553800.

The previous prime is 12331661429. The next prime is 12331661581. The reversal of 12331661436 is 63416613321.

12331661436 is a `hidden beast` number, since 1 + 2 + 3 + 3 + 1 + 6 + 614 + 36 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 342546151 = 12331661436 / (1 + 2 + 3 + 3 + 1 + 6 + 6 + 1 + 4 + 3 + 6).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 12331661436.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 171273040 + ... + 171273111.

Almost surely, 2^12331661436 is an apocalyptic number.

It is an amenable number.

12331661436 is an abundant number, since it is smaller than the sum of its proper divisors (18840038396).

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

12331661436 is a wasteful number, since it uses less digits than its factorization.

12331661436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342546161 (or 342546156 counting only the distinct ones).

The product of its digits is 46656, while the sum is 36.

The spelling of 12331661436 in words is "twelve billion, three hundred thirty-one million, six hundred sixty-one thousand, four hundred thirty-six".