51805744713 has 6 divisors (see below), whose sum is σ = 74830520154. Its totient is φ = 34537163136.

The previous prime is 51805744687. The next prime is 51805744729. The reversal of 51805744713 is 31744750815.

51805744713 is a `hidden beast` number, since 5 + 1 + 8 + 0 + 574 + 4 + 71 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 43818211584 + 7987533129 = 209328^2 + 89373^2 .

It is not a de Polignac number, because 51805744713 - 2¹² = 51805740617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51805744763) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2878096920 + ... + 2878096937.

It is an arithmetic number, because the mean of its divisors is an integer number (12471753359).

Almost surely, 2^51805744713 is an apocalyptic number.

It is an amenable number.

51805744713 is a deficient number, since it is larger than the sum of its proper divisors (23024775441).

51805744713 is a wasteful number, since it uses less digits than its factorization.

51805744713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5756193863 (or 5756193860 counting only the distinct ones).

The product of its (nonzero) digits is 470400, while the sum is 45.

The spelling of 51805744713 in words is "fifty-one billion, eight hundred five million, seven hundred forty-four thousand, seven hundred thirteen".