51188418737 has 2 divisors, whose sum is σ = 51188418738. Its totient is φ = 51188418736.

The previous prime is 51188418731. The next prime is 51188418857. The reversal of 51188418737 is 73781488115.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34423607296 + 16764811441 = 185536^2 + 129479^2 .

It is a cyclic number.

It is not a de Polignac number, because 51188418737 - 2²² = 51184224433 is a prime.

It is not a weakly prime, because it can be changed into another prime (51188418731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25594209368 + 25594209369.

It is an arithmetic number, because the mean of its divisors is an integer number (25594209369).

Almost surely, 2^51188418737 is an apocalyptic number.

It is an amenable number.

51188418737 is a deficient number, since it is larger than the sum of its proper divisors (1).

51188418737 is an equidigital number, since it uses as much as digits as its factorization.

51188418737 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1505280, while the sum is 53.

The spelling of 51188418737 in words is "fifty-one billion, one hundred eighty-eight million, four hundred eighteen thousand, seven hundred thirty-seven".