12542886261 has 16 divisors (see below), whose sum is σ = 18604998720. Its totient is φ = 8351598960.

The previous prime is 12542886197. The next prime is 12542886269. The reversal of 12542886261 is 16268824521.

12542886261 is a `hidden beast` number, since 1 + 2 + 542 + 8 + 86 + 26 + 1 = 666.

It is not a de Polignac number, because 12542886261 - 2⁶ = 12542886197 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12542886269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 264510 + ... + 308303.

It is an arithmetic number, because the mean of its divisors is an integer number (1162812420).

Almost surely, 2^12542886261 is an apocalyptic number.

It is an amenable number.

12542886261 is a deficient number, since it is larger than the sum of its proper divisors (6062112459).

12542886261 is an equidigital number, since it uses as much as digits as its factorization.

12542886261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 573633 (or 573627 counting only the distinct ones).

The product of its digits is 368640, while the sum is 45.

The spelling of 12542886261 in words is "twelve billion, five hundred forty-two million, eight hundred eighty-six thousand, two hundred sixty-one".