12880570561 has 4 divisors (see below), whose sum is σ = 13440595392. Its totient is φ = 12320545732.

The previous prime is 12880570541. The next prime is 12880570583. The reversal of 12880570561 is 16507508821.

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: 16507508821 = 25747 ⋅641143.

It is a cyclic number.

It is not a de Polignac number, because 12880570561 - 2¹⁷ = 12880439489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12880570511) 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, 280012381 + ... + 280012426.

It is an arithmetic number, because the mean of its divisors is an integer number (3360148848).

Almost surely, 2^12880570561 is an apocalyptic number.

It is an amenable number.

12880570561 is a deficient number, since it is larger than the sum of its proper divisors (560024831).

12880570561 is an equidigital number, since it uses as much as digits as its factorization.

12880570561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560024830.

The product of its (nonzero) digits is 134400, while the sum is 43.

The spelling of 12880570561 in words is "twelve billion, eight hundred eighty million, five hundred seventy thousand, five hundred sixty-one".