51905171738717 has 12 divisors (see below), whose sum is σ = 60055570609440. Its totient is φ = 44703018720360.

The previous prime is 51905171738669. The next prime is 51905171738723. The reversal of 51905171738717 is 71783717150915.

It is a happy number.

It is not a de Polignac number, because 51905171738717 - 2²⁸ = 51904903303261 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51905171738717.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51905171738737) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11288638793 + ... + 11288643390.

It is an arithmetic number, because the mean of its divisors is an integer number (5004630884120).

Almost surely, 2^{51905171738717} is an apocalyptic number.

It is an amenable number.

51905171738717 is a deficient number, since it is larger than the sum of its proper divisors (8150398870723).

51905171738717 is a wasteful number, since it uses less digits than its factorization.

51905171738717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22577282224 (or 22577282213 counting only the distinct ones).

The product of its (nonzero) digits is 12965400, while the sum is 62.

The spelling of 51905171738717 in words is "fifty-one trillion, nine hundred five billion, one hundred seventy-one million, seven hundred thirty-eight thousand, seven hundred seventeen".