12540979126 has 16 divisors (see below), whose sum is σ = 21139310304. Its totient is φ = 5536485504.

The previous prime is 12540979123. The next prime is 12540979133. The reversal of 12540979126 is 62197904521.

12540979126 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12540979123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10485171 + ... + 10486366.

It is an arithmetic number, because the mean of its divisors is an integer number (1321206894).

Almost surely, 2^12540979126 is an apocalyptic number.

12540979126 is a deficient number, since it is larger than the sum of its proper divisors (8598331178).

12540979126 is a wasteful number, since it uses less digits than its factorization.

12540979126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20971575.

The product of its (nonzero) digits is 272160, while the sum is 46.

The spelling of 12540979126 in words is "twelve billion, five hundred forty million, nine hundred seventy-nine thousand, one hundred twenty-six".