51387788927 has 2 divisors, whose sum is σ = 51387788928. Its totient is φ = 51387788926.

The previous prime is 51387788869. The next prime is 51387788951. The reversal of 51387788927 is 72988778315.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51387788927 - 2¹⁴ = 51387772543 is a prime.

It is a super-2 number, since 2×51387788927² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51387788327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25693894463 + 25693894464.

It is an arithmetic number, because the mean of its divisors is an integer number (25693894464).

Almost surely, 2^51387788927 is an apocalyptic number.

51387788927 is a deficient number, since it is larger than the sum of its proper divisors (1).

51387788927 is an equidigital number, since it uses as much as digits as its factorization.

51387788927 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47416320, while the sum is 65.

The spelling of 51387788927 in words is "fifty-one billion, three hundred eighty-seven million, seven hundred eighty-eight thousand, nine hundred twenty-seven".