12777845685 has 32 divisors (see below), whose sum is σ = 22313536128. Its totient is φ = 6192433920.

The previous prime is 12777845651. The next prime is 12777845699. The reversal of 12777845685 is 58654877721.

It is not a de Polignac number, because 12777845685 - 2⁶ = 12777845621 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 361459 + ... + 395231.

It is an arithmetic number, because the mean of its divisors is an integer number (697298004).

Almost surely, 2^12777845685 is an apocalyptic number.

12777845685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12777845685 is a deficient number, since it is larger than the sum of its proper divisors (9535690443).

12777845685 is a wasteful number, since it uses less digits than its factorization.

12777845685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36085.

The product of its digits is 26342400, while the sum is 60.

The spelling of 12777845685 in words is "twelve billion, seven hundred seventy-seven million, eight hundred forty-five thousand, six hundred eighty-five".