51017415370409 has 2 divisors, whose sum is σ = 51017415370410. Its totient is φ = 51017415370408.

The previous prime is 51017415370321. The next prime is 51017415370417. The reversal of 51017415370409 is 90407351471015.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50969890062400 + 47525308009 = 7139320^2 + 218003^2 .

It is a cyclic number.

It is not a de Polignac number, because 51017415370409 - 2⁸ = 51017415370153 is a prime.

It is not a weakly prime, because it can be changed into another prime (51017415376409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25508707685204 + 25508707685205.

It is an arithmetic number, because the mean of its divisors is an integer number (25508707685205).

Almost surely, 2^{51017415370409} is an apocalyptic number.

It is an amenable number.

51017415370409 is a deficient number, since it is larger than the sum of its proper divisors (1).

51017415370409 is an equidigital number, since it uses as much as digits as its factorization.

51017415370409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 529200, while the sum is 47.

The spelling of 51017415370409 in words is "fifty-one trillion, seventeen billion, four hundred fifteen million, three hundred seventy thousand, four hundred nine".