51359733715987 has 4 divisors (see below), whose sum is σ = 51403002237576. Its totient is φ = 51316465194400.

The previous prime is 51359733715943. The next prime is 51359733715999. The reversal of 51359733715987 is 78951733795315.

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 51359733715987 - 2⁷ = 51359733715859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51359733745987) 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, 21634259014 + ... + 21634261387.

It is an arithmetic number, because the mean of its divisors is an integer number (12850750559394).

Almost surely, 2^{51359733715987} is an apocalyptic number.

51359733715987 is a deficient number, since it is larger than the sum of its proper divisors (43268521589).

51359733715987 is a wasteful number, since it uses less digits than its factorization.

51359733715987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43268521588.

The product of its digits is 750141000, while the sum is 73.

The spelling of 51359733715987 in words is "fifty-one trillion, three hundred fifty-nine billion, seven hundred thirty-three million, seven hundred fifteen thousand, nine hundred eighty-seven".