12780247677 has 16 divisors (see below), whose sum is σ = 17323980480. Its totient is φ = 8378409600.

The previous prime is 12780247657. The next prime is 12780247687. The reversal of 12780247677 is 77674208721.

It is not a de Polignac number, because 12780247677 - 2⁸ = 12780247421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12780247657) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1158574 + ... + 1169552.

It is an arithmetic number, because the mean of its divisors is an integer number (1082748780).

Almost surely, 2^12780247677 is an apocalyptic number.

It is an amenable number.

12780247677 is a deficient number, since it is larger than the sum of its proper divisors (4543732803).

12780247677 is a wasteful number, since it uses less digits than its factorization.

12780247677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17404.

The product of its (nonzero) digits is 1843968, while the sum is 51.

The spelling of 12780247677 in words is "twelve billion, seven hundred eighty million, two hundred forty-seven thousand, six hundred seventy-seven".