51277167222509 has 2 divisors, whose sum is σ = 51277167222510. Its totient is φ = 51277167222508.

The previous prime is 51277167222493. The next prime is 51277167222517. The reversal of 51277167222509 is 90522276177215.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38695802154025 + 12581365068484 = 6220595^2 + 3547022^2 .

It is a cyclic number.

It is not a de Polignac number, because 51277167222509 - 2⁴ = 51277167222493 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51277167222109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25638583611254 + 25638583611255.

It is an arithmetic number, because the mean of its divisors is an integer number (25638583611255).

Almost surely, 2^{51277167222509} is an apocalyptic number.

It is an amenable number.

51277167222509 is a deficient number, since it is larger than the sum of its proper divisors (1).

51277167222509 is an equidigital number, since it uses as much as digits as its factorization.

51277167222509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7408800, while the sum is 56.

The spelling of 51277167222509 in words is "fifty-one trillion, two hundred seventy-seven billion, one hundred sixty-seven million, two hundred twenty-two thousand, five hundred nine".