12851777779 has 8 divisors (see below), whose sum is σ = 13604128560. Its totient is φ = 12120039456.

The previous prime is 12851777773. The next prime is 12851777791. The reversal of 12851777779 is 97777715821.

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 12851777779 - 2³¹ = 10704294131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12851777773) 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, 5151832 + ... + 5154325.

It is an arithmetic number, because the mean of its divisors is an integer number (1700516070).

Almost surely, 2^12851777779 is an apocalyptic number.

12851777779 is a deficient number, since it is larger than the sum of its proper divisors (752350781).

12851777779 is a wasteful number, since it uses less digits than its factorization.

12851777779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10306229.

The product of its digits is 12101040, while the sum is 61.

The spelling of 12851777779 in words is "twelve billion, eight hundred fifty-one million, seven hundred seventy-seven thousand, seven hundred seventy-nine".