12977786389 has 8 divisors (see below), whose sum is σ = 13025492480. Its totient is φ = 12930150096.

The previous prime is 12977786377. The next prime is 12977786411. The reversal of 12977786389 is 98368777921.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12977786389 - 2¹¹ = 12977784341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12977781389) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 370804 + ... + 404290.

It is an arithmetic number, because the mean of its divisors is an integer number (1628186560).

Almost surely, 2^12977786389 is an apocalyptic number.

It is an amenable number.

12977786389 is a deficient number, since it is larger than the sum of its proper divisors (47706091).

12977786389 is a wasteful number, since it uses less digits than its factorization.

12977786389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34899.

The product of its digits is 64012032, while the sum is 67.

The spelling of 12977786389 in words is "twelve billion, nine hundred seventy-seven million, seven hundred eighty-six thousand, three hundred eighty-nine".