51688957327 has 6 divisors (see below), whose sum is σ = 59073781544. Its totient is φ = 44304304980.

The previous prime is 51688957301. The next prime is 51688957361. The reversal of 51688957327 is 72375988615.

51688957327 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-51688957327 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 (51688957387) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 558552 + ... + 644482.

Almost surely, 2^51688957327 is an apocalyptic number.

51688957327 is a deficient number, since it is larger than the sum of its proper divisors (7384824217).

51688957327 is an frugal number, since it uses more digits than its factorization.

51688957327 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171869 (or 85938 counting only the distinct ones).

The product of its digits is 25401600, while the sum is 61.

The spelling of 51688957327 in words is "fifty-one billion, six hundred eighty-eight million, nine hundred fifty-seven thousand, three hundred twenty-seven".