12779854158 has 16 divisors (see below), whose sum is σ = 25560976896. Its totient is φ = 4259739960.

The previous prime is 12779854151. The next prime is 12779854169. The reversal of 12779854158 is 85145897721.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12779854098 and 12779854107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12779854151) 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, 123235 + ... + 201857.

It is an arithmetic number, because the mean of its divisors is an integer number (1597561056).

Almost surely, 2^12779854158 is an apocalyptic number.

12779854158 is an abundant number, since it is smaller than the sum of its proper divisors (12781122738).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12779854158 is a wasteful number, since it uses less digits than its factorization.

12779854158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105719.

The product of its digits is 5644800, while the sum is 57.

The spelling of 12779854158 in words is "twelve billion, seven hundred seventy-nine million, eight hundred fifty-four thousand, one hundred fifty-eight".