12796479978 has 16 divisors (see below), whose sum is σ = 25856806080. Its totient is φ = 4221518976.

The previous prime is 12796479967. The next prime is 12796479979. The reversal of 12796479978 is 87997469721.

It is not an unprimeable number, because it can be changed into a prime (12796479979) 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, 10992958 + ... + 10994121.

It is an arithmetic number, because the mean of its divisors is an integer number (1616050380).

Almost surely, 2^12796479978 is an apocalyptic number.

12796479978 is an abundant number, since it is smaller than the sum of its proper divisors (13060326102).

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

12796479978 is a wasteful number, since it uses less digits than its factorization.

12796479978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21987181.

The product of its digits is 96018048, while the sum is 69.

The spelling of 12796479978 in words is "twelve billion, seven hundred ninety-six million, four hundred seventy-nine thousand, nine hundred seventy-eight".