12929275561 has 4 divisors (see below), whose sum is σ = 13229956432. Its totient is φ = 12628594692.

The previous prime is 12929275559. The next prime is 12929275571. The reversal of 12929275561 is 16557292921.

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.

It is a cyclic number.

It is not a de Polignac number, because 12929275561 - 2¹ = 12929275559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12929275571) 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, 150340371 + ... + 150340456.

It is an arithmetic number, because the mean of its divisors is an integer number (3307489108).

Almost surely, 2^12929275561 is an apocalyptic number.

It is an amenable number.

12929275561 is a deficient number, since it is larger than the sum of its proper divisors (300680871).

12929275561 is an equidigital number, since it uses as much as digits as its factorization.

12929275561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300680870.

The product of its digits is 680400, while the sum is 49.

The spelling of 12929275561 in words is "twelve billion, nine hundred twenty-nine million, two hundred seventy-five thousand, five hundred sixty-one".