51678881123 has 2 divisors, whose sum is σ = 51678881124. Its totient is φ = 51678881122.

The previous prime is 51678881119. The next prime is 51678881231. The reversal of 51678881123 is 32118887615.

Together with next prime (51678881231) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51678881123 - 2² = 51678881119 is a prime.

It is a super-3 number, since 3×51678881123³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (51678881323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25839440561 + 25839440562.

It is an arithmetic number, because the mean of its divisors is an integer number (25839440562).

Almost surely, 2^51678881123 is an apocalyptic number.

51678881123 is a deficient number, since it is larger than the sum of its proper divisors (1).

51678881123 is an equidigital number, since it uses as much as digits as its factorization.

51678881123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 645120, while the sum is 50.

The spelling of 51678881123 in words is "fifty-one billion, six hundred seventy-eight million, eight hundred eighty-one thousand, one hundred twenty-three".