12854949779 has 24 divisors (see below), whose sum is σ = 14994739200. Its totient is φ = 10794914928.

The previous prime is 12854949773. The next prime is 12854949781. The reversal of 12854949779 is 97794945821.

It is not a de Polignac number, because 12854949779 - 2⁴ = 12854949763 is a prime.

It is a super-2 number, since 2×12854949779² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12854949773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6123272 + ... + 6125370.

It is an arithmetic number, because the mean of its divisors is an integer number (624780800).

Almost surely, 2^12854949779 is an apocalyptic number.

12854949779 is a deficient number, since it is larger than the sum of its proper divisors (2139789421).

12854949779 is an equidigital number, since it uses as much as digits as its factorization.

12854949779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2399 (or 2316 counting only the distinct ones).

The product of its digits is 45722880, while the sum is 65.

The spelling of 12854949779 in words is "twelve billion, eight hundred fifty-four million, nine hundred forty-nine thousand, seven hundred seventy-nine".