51859660673 has 4 divisors (see below), whose sum is σ = 51958819248. Its totient is φ = 51760502100.

The previous prime is 51859660667. The next prime is 51859660681. The reversal of 51859660673 is 37606695815.

It is a happy number.

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-51859660673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51859660603) 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, 49578503 + ... + 49579548.

It is an arithmetic number, because the mean of its divisors is an integer number (12989704812).

Almost surely, 2^51859660673 is an apocalyptic number.

It is an amenable number.

51859660673 is a deficient number, since it is larger than the sum of its proper divisors (99158575).

51859660673 is an equidigital number, since it uses as much as digits as its factorization.

51859660673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99158574.

The product of its (nonzero) digits is 8164800, while the sum is 56.

The spelling of 51859660673 in words is "fifty-one billion, eight hundred fifty-nine million, six hundred sixty thousand, six hundred seventy-three".