12158321705 has 8 divisors (see below), whose sum is σ = 14601295104. Its totient is φ = 9719118000.

The previous prime is 12158321641. The next prime is 12158321713. The reversal of 12158321705 is 50712385121.

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

It is not a de Polignac number, because 12158321705 - 2⁶ = 12158321641 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 935321 + ... + 948230.

It is an arithmetic number, because the mean of its divisors is an integer number (1825161888).

Almost surely, 2^12158321705 is an apocalyptic number.

It is an amenable number.

12158321705 is a deficient number, since it is larger than the sum of its proper divisors (2442973399).

12158321705 is a wasteful number, since it uses less digits than its factorization.

12158321705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1884847.

The product of its (nonzero) digits is 16800, while the sum is 35.

The spelling of 12158321705 in words is "twelve billion, one hundred fifty-eight million, three hundred twenty-one thousand, seven hundred five".