12583969777 has 4 divisors (see below), whose sum is σ = 12668426100. Its totient is φ = 12499513456.

The previous prime is 12583969763. The next prime is 12583969793. The reversal of 12583969777 is 77796938521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7085598976 + 5498370801 = 84176^2 + 74151^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12583969777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12583969747) 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, 42227938 + ... + 42228235.

It is an arithmetic number, because the mean of its divisors is an integer number (3167106525).

Almost surely, 2^12583969777 is an apocalyptic number.

It is an amenable number.

12583969777 is a deficient number, since it is larger than the sum of its proper divisors (84456323).

12583969777 is an equidigital number, since it uses as much as digits as its factorization.

12583969777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84456322.

The product of its digits is 40007520, while the sum is 64.

The spelling of 12583969777 in words is "twelve billion, five hundred eighty-three million, nine hundred sixty-nine thousand, seven hundred seventy-seven".