12731742777 has 32 divisors (see below), whose sum is σ = 18941932800. Its totient is φ = 7552726272.

The previous prime is 12731742767. The next prime is 12731742817. The reversal of 12731742777 is 77724713721.

It is a happy number.

It is not a de Polignac number, because 12731742777 - 2¹⁴ = 12731726393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12731742707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 729924 + ... + 747162.

It is an arithmetic number, because the mean of its divisors is an integer number (591935400).

Almost surely, 2^12731742777 is an apocalyptic number.

It is an amenable number.

12731742777 is a deficient number, since it is larger than the sum of its proper divisors (6210190023).

12731742777 is a wasteful number, since it uses less digits than its factorization.

12731742777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17937.

The product of its digits is 806736, while the sum is 48.

The spelling of 12731742777 in words is "twelve billion, seven hundred thirty-one million, seven hundred forty-two thousand, seven hundred seventy-seven".