51726531053647 has 4 divisors (see below), whose sum is σ = 51740832005856. Its totient is φ = 51712230101440.

The previous prime is 51726531053623. The next prime is 51726531053657. The reversal of 51726531053647 is 74635013562715.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51726531053647 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 (51726531053657) 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, 7150470679 + ... + 7150477912.

It is an arithmetic number, because the mean of its divisors is an integer number (12935208001464).

Almost surely, 2^{51726531053647} is an apocalyptic number.

51726531053647 is a deficient number, since it is larger than the sum of its proper divisors (14300952209).

51726531053647 is a wasteful number, since it uses less digits than its factorization.

51726531053647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14300952208.

The product of its (nonzero) digits is 15876000, while the sum is 55.

The spelling of 51726531053647 in words is "fifty-one trillion, seven hundred twenty-six billion, five hundred thirty-one million, fifty-three thousand, six hundred forty-seven".