12006778831 has 8 divisors (see below), whose sum is σ = 12177951264. Its totient is φ = 11835663840.

The previous prime is 12006778829. The next prime is 12006778837. The reversal of 12006778831 is 13887760021.

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

It is a cyclic number.

It is not a de Polignac number, because 12006778831 - 2¹ = 12006778829 is a prime.

It is a super-2 number, since 2×12006778831² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12006778837) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 580341 + ... + 600673.

It is an arithmetic number, because the mean of its divisors is an integer number (1522243908).

Almost surely, 2^12006778831 is an apocalyptic number.

12006778831 is a deficient number, since it is larger than the sum of its proper divisors (171172433).

12006778831 is an equidigital number, since it uses as much as digits as its factorization.

12006778831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28721.

The product of its (nonzero) digits is 112896, while the sum is 43.

The spelling of 12006778831 in words is "twelve billion, six million, seven hundred seventy-eight thousand, eight hundred thirty-one".