51172663205 has 8 divisors (see below), whose sum is σ = 62835270432. Its totient is φ = 39986080848.

The previous prime is 51172663189. The next prime is 51172663301. The reversal of 51172663205 is 50236627115.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51172663205 - 2⁴ = 51172663189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119005979 + ... + 119006408.

It is an arithmetic number, because the mean of its divisors is an integer number (7854408804).

Almost surely, 2^51172663205 is an apocalyptic number.

It is an amenable number.

51172663205 is a deficient number, since it is larger than the sum of its proper divisors (11662607227).

51172663205 is a wasteful number, since it uses less digits than its factorization.

51172663205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238012435.

The product of its (nonzero) digits is 75600, while the sum is 38.

The spelling of 51172663205 in words is "fifty-one billion, one hundred seventy-two million, six hundred sixty-three thousand, two hundred five".