12773479681 has 4 divisors (see below), whose sum is σ = 13070537392. Its totient is φ = 12476421972.

The previous prime is 12773479673. The next prime is 12773479711. The reversal of 12773479681 is 18697437721.

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: 18697437721 = 79397 ⋅235493.

It is a cyclic number.

It is not a de Polignac number, because 12773479681 - 2³ = 12773479673 is a prime.

It is a super-2 number, since 2×12773479681² (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 (12773479981) 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, 148528791 + ... + 148528876.

It is an arithmetic number, because the mean of its divisors is an integer number (3267634348).

Almost surely, 2^12773479681 is an apocalyptic number.

It is an amenable number.

12773479681 is a deficient number, since it is larger than the sum of its proper divisors (297057711).

12773479681 is an equidigital number, since it uses as much as digits as its factorization.

12773479681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297057710.

The product of its digits is 3556224, while the sum is 55.

The spelling of 12773479681 in words is "twelve billion, seven hundred seventy-three million, four hundred seventy-nine thousand, six hundred eighty-one".