12865422258 has 24 divisors (see below), whose sum is σ = 30019319148. Its totient is φ = 3958591392.

The previous prime is 12865422257. The next prime is 12865422277. The reversal of 12865422258 is 85222456821.

12865422258 is a `hidden beast` number, since 1 + 2 + 86 + 542 + 2 + 25 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 12487392009 + 378030249 = 111747^2 + 19443^2 .

It is not an unprimeable number, because it can be changed into a prime (12865422257) 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, 27489985 + ... + 27490452.

Almost surely, 2^12865422258 is an apocalyptic number.

12865422258 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12865422258 is an abundant number, since it is smaller than the sum of its proper divisors (17153896890).

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

12865422258 is a wasteful number, since it uses less digits than its factorization.

12865422258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54980458 (or 54980455 counting only the distinct ones).

The product of its digits is 614400, while the sum is 45.

The spelling of 12865422258 in words is "twelve billion, eight hundred sixty-five million, four hundred twenty-two thousand, two hundred fifty-eight".