51365140007 has 4 divisors (see below), whose sum is σ = 51365662080. Its totient is φ = 51364617936.

The previous prime is 51365139997. The next prime is 51365140019. The reversal of 51365140007 is 70004156315.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51365140007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51365140207) 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, 63758 + ... + 326795.

It is an arithmetic number, because the mean of its divisors is an integer number (12841415520).

Almost surely, 2^51365140007 is an apocalyptic number.

51365140007 is a deficient number, since it is larger than the sum of its proper divisors (522073).

51365140007 is a wasteful number, since it uses less digits than its factorization.

51365140007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522072.

The product of its (nonzero) digits is 12600, while the sum is 32.

The spelling of 51365140007 in words is "fifty-one billion, three hundred sixty-five million, one hundred forty thousand, seven".