12917782026 has 24 divisors (see below), whose sum is σ = 28891384704. Its totient is φ = 4167026280.

The previous prime is 12917782021. The next prime is 12917782043. The reversal of 12917782026 is 62028771921.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (12917782021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11574516 + ... + 11575631.

It is an arithmetic number, because the mean of its divisors is an integer number (1203807696).

Almost surely, 2^12917782026 is an apocalyptic number.

12917782026 is an abundant number, since it is smaller than the sum of its proper divisors (15973602678).

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

12917782026 is a wasteful number, since it uses less digits than its factorization.

12917782026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23150186 (or 23150183 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 45.

The spelling of 12917782026 in words is "twelve billion, nine hundred seventeen million, seven hundred eighty-two thousand, twenty-six".