51087436406197 has 2 divisors, whose sum is σ = 51087436406198. Its totient is φ = 51087436406196.

The previous prime is 51087436406137. The next prime is 51087436406207. The reversal of 51087436406197 is 79160463478015.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34085676830436 + 17001759575761 = 5838294^2 + 4123319^2 .

It is a cyclic number.

It is not a de Polignac number, because 51087436406197 - 2¹¹ = 51087436404149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51087436406137) 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, 25543718203098 + 25543718203099.

It is an arithmetic number, because the mean of its divisors is an integer number (25543718203099).

Almost surely, 2^{51087436406197} is an apocalyptic number.

It is an amenable number.

51087436406197 is a deficient number, since it is larger than the sum of its proper divisors (1).

51087436406197 is an equidigital number, since it uses as much as digits as its factorization.

51087436406197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30481920, while the sum is 61.

The spelling of 51087436406197 in words is "fifty-one trillion, eighty-seven billion, four hundred thirty-six million, four hundred six thousand, one hundred ninety-seven".