51534642759 has 4 divisors (see below), whose sum is σ = 68712857016. Its totient is φ = 34356428504.

The previous prime is 51534642751. The next prime is 51534642851. The reversal of 51534642759 is 95724643515.

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 51534642759 - 2³ = 51534642751 is a prime.

It is a super-2 number, since 2×51534642759² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51534642751) 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, 8589107124 + ... + 8589107129.

It is an arithmetic number, because the mean of its divisors is an integer number (17178214254).

Almost surely, 2^51534642759 is an apocalyptic number.

51534642759 is a deficient number, since it is larger than the sum of its proper divisors (17178214257).

51534642759 is a wasteful number, since it uses less digits than its factorization.

51534642759 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17178214256.

The product of its digits is 4536000, while the sum is 51.

The spelling of 51534642759 in words is "fifty-one billion, five hundred thirty-four million, six hundred forty-two thousand, seven hundred fifty-nine".