51804717017 has 2 divisors, whose sum is σ = 51804717018. Its totient is φ = 51804717016.

The previous prime is 51804716923. The next prime is 51804717031. The reversal of 51804717017 is 71071740815.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45823396096 + 5981320921 = 214064^2 + 77339^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51804717017 is a prime.

It is a super-2 number, since 2×51804717017² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51804717067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25902358508 + 25902358509.

It is an arithmetic number, because the mean of its divisors is an integer number (25902358509).

Almost surely, 2^51804717017 is an apocalyptic number.

It is an amenable number.

51804717017 is a deficient number, since it is larger than the sum of its proper divisors (1).

51804717017 is an equidigital number, since it uses as much as digits as its factorization.

51804717017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54880, while the sum is 41.

The spelling of 51804717017 in words is "fifty-one billion, eight hundred four million, seven hundred seventeen thousand, seventeen".