51331681706 has 8 divisors (see below), whose sum is σ = 78052283364. Its totient is φ = 25314253920.

The previous prime is 51331681699. The next prime is 51331681757. The reversal of 51331681706 is 60718613315.

It can be written as a sum of positive squares in 2 ways, for example, as 51320824681 + 10857025 = 226541^2 + 3295^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 175793285 + ... + 175793576.

Almost surely, 2^51331681706 is an apocalyptic number.

51331681706 is a deficient number, since it is larger than the sum of its proper divisors (26720601658).

51331681706 is a wasteful number, since it uses less digits than its factorization.

51331681706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351586936.

The product of its (nonzero) digits is 90720, while the sum is 41.

The spelling of 51331681706 in words is "fifty-one billion, three hundred thirty-one million, six hundred eighty-one thousand, seven hundred six".