51706660715 has 4 divisors (see below), whose sum is σ = 62047992864. Its totient is φ = 41365328568.

The previous prime is 51706660711. The next prime is 51706660727.

51706660715 is nontrivially palindromic in base 10.

51706660715 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51706660715 - 2² = 51706660711 is a prime.

It is a super-2 number, since 2×51706660715² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51706660711) 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, 5170666067 + ... + 5170666076.

It is an arithmetic number, because the mean of its divisors is an integer number (15511998216).

Almost surely, 2^51706660715 is an apocalyptic number.

51706660715 is a deficient number, since it is larger than the sum of its proper divisors (10341332149).

51706660715 is a wasteful number, since it uses less digits than its factorization.

51706660715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10341332148.

The product of its (nonzero) digits is 264600, while the sum is 44.

The spelling of 51706660715 in words is "fifty-one billion, seven hundred six million, six hundred sixty thousand, seven hundred fifteen".