51538264654837 has 2 divisors, whose sum is σ = 51538264654838. Its totient is φ = 51538264654836.

The previous prime is 51538264654783. The next prime is 51538264654843. The reversal of 51538264654837 is 73845646283515.

It is a happy number.

Together with previous prime (51538264654783) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26522922301681 + 25015342353156 = 5150041^2 + 5001534^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51538264654837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51538264654847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25769132327418 + 25769132327419.

It is an arithmetic number, because the mean of its divisors is an integer number (25769132327419).

Almost surely, 2^{51538264654837} is an apocalyptic number.

It is an amenable number.

51538264654837 is a deficient number, since it is larger than the sum of its proper divisors (1).

51538264654837 is an equidigital number, since it uses as much as digits as its factorization.

51538264654837 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608000, while the sum is 67.

The spelling of 51538264654837 in words is "fifty-one trillion, five hundred thirty-eight billion, two hundred sixty-four million, six hundred fifty-four thousand, eight hundred thirty-seven".