12840608057 has 6 divisors (see below), whose sum is σ = 13197032478. Its totient is φ = 12493563264.

The previous prime is 12840608047. The next prime is 12840608059. The reversal of 12840608057 is 75080604821.

It can be written as a sum of positive squares in 3 ways, for example, as 8763019321 + 4077588736 = 93611^2 + 63856^2 .

It is not a de Polignac number, because 12840608057 - 2¹⁰ = 12840607033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12840608059) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4688408 + ... + 4691145.

It is an arithmetic number, because the mean of its divisors is an integer number (2199505413).

Almost surely, 2^12840608057 is an apocalyptic number.

It is an amenable number.

12840608057 is a deficient number, since it is larger than the sum of its proper divisors (356424421).

12840608057 is an frugal number, since it uses more digits than its factorization.

12840608057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9379627 (or 9379590 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 41.

The spelling of 12840608057 in words is "twelve billion, eight hundred forty million, six hundred eight thousand, fifty-seven".