51601622759 has 2 divisors, whose sum is σ = 51601622760. Its totient is φ = 51601622758.

The previous prime is 51601622731. The next prime is 51601622767. The reversal of 51601622759 is 95722610615.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51601622759 - 2²⁰ = 51600574183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51601622159) 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, 25800811379 + 25800811380.

It is an arithmetic number, because the mean of its divisors is an integer number (25800811380).

Almost surely, 2^51601622759 is an apocalyptic number.

51601622759 is a deficient number, since it is larger than the sum of its proper divisors (1).

51601622759 is an equidigital number, since it uses as much as digits as its factorization.

51601622759 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 226800, while the sum is 44.

The spelling of 51601622759 in words is "fifty-one billion, six hundred one million, six hundred twenty-two thousand, seven hundred fifty-nine".