51803823709 has 4 divisors (see below), whose sum is σ = 56513262240. Its totient is φ = 47094385180.

The previous prime is 51803823707. The next prime is 51803823727. The reversal of 51803823709 is 90732830815.

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 not a de Polignac number, because 51803823709 - 2¹ = 51803823707 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 (51803823707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2354719249 + ... + 2354719270.

It is an arithmetic number, because the mean of its divisors is an integer number (14128315560).

Almost surely, 2^51803823709 is an apocalyptic number.

It is an amenable number.

51803823709 is a deficient number, since it is larger than the sum of its proper divisors (4709438531).

51803823709 is a wasteful number, since it uses less digits than its factorization.

51803823709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4709438530.

The product of its (nonzero) digits is 362880, while the sum is 46.

The spelling of 51803823709 in words is "fifty-one billion, eight hundred three million, eight hundred twenty-three thousand, seven hundred nine".