12539061451 has 4 divisors (see below), whose sum is σ = 14330355952. Its totient is φ = 10747766952.

The previous prime is 12539061439. The next prime is 12539061473. The reversal of 12539061451 is 15416093521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15416093521 = 41 ⋅376002281.

It is a cyclic number.

It is not a de Polignac number, because 12539061451 - 2⁹ = 12539060939 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12539061451.

It is not an unprimeable number, because it can be changed into a prime (12539061401) 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 3 ways as a sum of consecutive naturals, for example, 895647240 + ... + 895647253.

It is an arithmetic number, because the mean of its divisors is an integer number (3582588988).

Almost surely, 2^12539061451 is an apocalyptic number.

12539061451 is the 64651-st hex number.

12539061451 is a deficient number, since it is larger than the sum of its proper divisors (1791294501).

12539061451 is an equidigital number, since it uses as much as digits as its factorization.

12539061451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1791294500.

The product of its (nonzero) digits is 32400, while the sum is 37.

The spelling of 12539061451 in words is "twelve billion, five hundred thirty-nine million, sixty-one thousand, four hundred fifty-one".