12932705857 has 4 divisors (see below), whose sum is σ = 13494997440. Its totient is φ = 12370414276.

The previous prime is 12932705803. The next prime is 12932705869. The reversal of 12932705857 is 75850723921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75850723921 = 7 ⋅10835817703.

It is a cyclic number.

It is not a de Polignac number, because 12932705857 - 2²³ = 12924317249 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12932705857.

It is not an unprimeable number, because it can be changed into a prime (12932705257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 281145757 + ... + 281145802.

It is an arithmetic number, because the mean of its divisors is an integer number (3373749360).

Almost surely, 2^12932705857 is an apocalyptic number.

It is an amenable number.

12932705857 is a deficient number, since it is larger than the sum of its proper divisors (562291583).

12932705857 is an equidigital number, since it uses as much as digits as its factorization.

12932705857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562291582.

The product of its (nonzero) digits is 1058400, while the sum is 49.

The spelling of 12932705857 in words is "twelve billion, nine hundred thirty-two million, seven hundred five thousand, eight hundred fifty-seven".