51726805449 has 16 divisors (see below), whose sum is σ = 75780284160. Its totient is φ = 31124039760.

The previous prime is 51726805393. The next prime is 51726805457. The reversal of 51726805449 is 94450862715.

It is not a de Polignac number, because 51726805449 - 2¹² = 51726801353 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51726805469) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5633827 + ... + 5643000.

It is an arithmetic number, because the mean of its divisors is an integer number (4736267760).

Almost surely, 2^51726805449 is an apocalyptic number.

It is an amenable number.

51726805449 is a deficient number, since it is larger than the sum of its proper divisors (24053478711).

51726805449 is a wasteful number, since it uses less digits than its factorization.

51726805449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11276980.

The product of its (nonzero) digits is 2419200, while the sum is 51.

The spelling of 51726805449 in words is "fifty-one billion, seven hundred twenty-six million, eight hundred five thousand, four hundred forty-nine".