12704443877 has 4 divisors (see below), whose sum is σ = 12704823276. Its totient is φ = 12704064480.

The previous prime is 12704443867. The next prime is 12704443897. The reversal of 12704443877 is 77834440721.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10690319236 + 2014124641 = 103394^2 + 44879^2 .

It is a cyclic number.

It is not a de Polignac number, because 12704443877 - 2¹⁴ = 12704427493 is a prime.

It is a super-2 number, since 2×12704443877² (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 (12704443847) 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, 134024 + ... + 208257.

It is an arithmetic number, because the mean of its divisors is an integer number (3176205819).

Almost surely, 2^12704443877 is an apocalyptic number.

It is an amenable number.

12704443877 is a deficient number, since it is larger than the sum of its proper divisors (379399).

12704443877 is an equidigital number, since it uses as much as digits as its factorization.

12704443877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379398.

The product of its (nonzero) digits is 1053696, while the sum is 47.

The spelling of 12704443877 in words is "twelve billion, seven hundred four million, four hundred forty-three thousand, eight hundred seventy-seven".