51517757751 has 8 divisors (see below), whose sum is σ = 68697970800. Its totient is φ = 34341358272.

The previous prime is 51517757737. The next prime is 51517757761. The reversal of 51517757751 is 15775771515.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51517757751 - 2⁷ = 51517757623 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51517757694 and 51517757703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51517757701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 921720 + ... + 976013.

It is an arithmetic number, because the mean of its divisors is an integer number (8587246350).

Almost surely, 2^51517757751 is an apocalyptic number.

51517757751 is a deficient number, since it is larger than the sum of its proper divisors (17180213049).

51517757751 is a wasteful number, since it uses less digits than its factorization.

51517757751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1906785.

The product of its digits is 1500625, while the sum is 51.

The spelling of 51517757751 in words is "fifty-one billion, five hundred seventeen million, seven hundred fifty-seven thousand, seven hundred fifty-one".