51726641278503 has 4 divisors (see below), whose sum is σ = 68968855038008. Its totient is φ = 34484427519000.

The previous prime is 51726641278471. The next prime is 51726641278537. The reversal of 51726641278503 is 30587214662715.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 51726641278503 - 2⁵ = 51726641278471 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 (51726641278553) 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, 8621106879748 + ... + 8621106879753.

It is an arithmetic number, because the mean of its divisors is an integer number (17242213759502).

Almost surely, 2^{51726641278503} is an apocalyptic number.

51726641278503 is a deficient number, since it is larger than the sum of its proper divisors (17242213759505).

51726641278503 is a wasteful number, since it uses less digits than its factorization.

51726641278503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17242213759504.

The product of its (nonzero) digits is 16934400, while the sum is 57.

The spelling of 51726641278503 in words is "fifty-one trillion, seven hundred twenty-six billion, six hundred forty-one million, two hundred seventy-eight thousand, five hundred three".