51820051838713 has 4 divisors (see below), whose sum is σ = 51822201448080. Its totient is φ = 51817902229348.

The previous prime is 51820051838651. The next prime is 51820051838759. The reversal of 51820051838713 is 31783815002815.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51820051838713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51820051838213) 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, 1074768523 + ... + 1074816736.

It is an arithmetic number, because the mean of its divisors is an integer number (12955550362020).

Almost surely, 2^{51820051838713} is an apocalyptic number.

It is an amenable number.

51820051838713 is a deficient number, since it is larger than the sum of its proper divisors (2149609367).

51820051838713 is a wasteful number, since it uses less digits than its factorization.

51820051838713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2149609366.

The product of its (nonzero) digits is 1612800, while the sum is 52.

The spelling of 51820051838713 in words is "fifty-one trillion, eight hundred twenty billion, fifty-one million, eight hundred thirty-eight thousand, seven hundred thirteen".