12261239716 has 24 divisors (see below), whose sum is σ = 23410981440. Its totient is φ = 5572538400.

The previous prime is 12261239693. The next prime is 12261239743. The reversal of 12261239716 is 61793216221.

It is a happy number.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 432465 + ... + 459943.

It is an arithmetic number, because the mean of its divisors is an integer number (975457560).

Almost surely, 2^12261239716 is an apocalyptic number.

It is an amenable number.

12261239716 is a deficient number, since it is larger than the sum of its proper divisors (11149741724).

12261239716 is a wasteful number, since it uses less digits than its factorization.

12261239716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37635 (or 37633 counting only the distinct ones).

The product of its digits is 54432, while the sum is 40.

The spelling of 12261239716 in words is "twelve billion, two hundred sixty-one million, two hundred thirty-nine thousand, seven hundred sixteen".