51444113453 has 4 divisors (see below), whose sum is σ = 51449363580. Its totient is φ = 51438863328.

The previous prime is 51444113437. The next prime is 51444113473. The reversal of 51444113453 is 35431144415.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 35431144415 = 5 ⋅7086228883.

It can be written as a sum of positive squares in 2 ways, for example, as 47077282729 + 4366830724 = 216973^2 + 66082^2 .

It is a cyclic number.

It is not a de Polignac number, because 51444113453 - 2⁴ = 51444113437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51444113473) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2610338 + ... + 2629971.

It is an arithmetic number, because the mean of its divisors is an integer number (12862340895).

Almost surely, 2^51444113453 is an apocalyptic number.

It is an amenable number.

51444113453 is a deficient number, since it is larger than the sum of its proper divisors (5250127).

51444113453 is an equidigital number, since it uses as much as digits as its factorization.

51444113453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5250126.

The product of its digits is 57600, while the sum is 35.

Adding to 51444113453 its reverse (35431144415), we get a palindrome (86875257868).

The spelling of 51444113453 in words is "fifty-one billion, four hundred forty-four million, one hundred thirteen thousand, four hundred fifty-three".