12156435705 has 8 divisors (see below), whose sum is σ = 19450297152. Its totient is φ = 6483432368.

The previous prime is 12156435679. The next prime is 12156435719. The reversal of 12156435705 is 50753465121.

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 12156435705 - 2¹⁴ = 12156419321 is a prime.

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, 405214509 + ... + 405214538.

It is an arithmetic number, because the mean of its divisors is an integer number (2431287144).

Almost surely, 2^12156435705 is an apocalyptic number.

12156435705 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12156435705 is a deficient number, since it is larger than the sum of its proper divisors (7293861447).

12156435705 is an equidigital number, since it uses as much as digits as its factorization.

12156435705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810429055.

The product of its (nonzero) digits is 126000, while the sum is 39.

The spelling of 12156435705 in words is "twelve billion, one hundred fifty-six million, four hundred thirty-five thousand, seven hundred five".