12769692281 has 4 divisors (see below), whose sum is σ = 12834513252. Its totient is φ = 12704871312.

The previous prime is 12769692263. The next prime is 12769692319. The reversal of 12769692281 is 18229696721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18229696721 = 5059 ⋅3603419.

It can be written as a sum of positive squares in 2 ways, for example, as 12633760000 + 135932281 = 112400^2 + 11659^2 .

It is a cyclic number.

It is not a de Polignac number, because 12769692281 - 2²² = 12765497977 is a prime.

It is a super-2 number, since 2×12769692281² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12769692211) 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, 32410190 + ... + 32410583.

It is an arithmetic number, because the mean of its divisors is an integer number (3208628313).

Almost surely, 2^12769692281 is an apocalyptic number.

It is an amenable number.

12769692281 is a deficient number, since it is larger than the sum of its proper divisors (64820971).

12769692281 is an equidigital number, since it uses as much as digits as its factorization.

12769692281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64820970.

The product of its digits is 1306368, while the sum is 53.

The spelling of 12769692281 in words is "twelve billion, seven hundred sixty-nine million, six hundred ninety-two thousand, two hundred eighty-one".