51688671576281 has 16 divisors (see below), whose sum is σ = 54416199600000. Its totient is φ = 49025363552256.

The previous prime is 51688671576251. The next prime is 51688671576293. The reversal of 51688671576281 is 18267517688615.

It is a de Polignac number, because none of the positive numbers 2^k-51688671576281 is a prime.

It is a super-2 number, since 2×51688671576281² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51688671576251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8403176 + ... + 13190553.

It is an arithmetic number, because the mean of its divisors is an integer number (3401012475000).

Almost surely, 2^{51688671576281} is an apocalyptic number.

It is an amenable number.

51688671576281 is a deficient number, since it is larger than the sum of its proper divisors (2727528023719).

51688671576281 is a wasteful number, since it uses less digits than its factorization.

51688671576281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21595216.

The product of its digits is 270950400, while the sum is 71.

The spelling of 51688671576281 in words is "fifty-one trillion, six hundred eighty-eight billion, six hundred seventy-one million, five hundred seventy-six thousand, two hundred eighty-one".