51530998177 has 2 divisors, whose sum is σ = 51530998178. Its totient is φ = 51530998176.

The previous prime is 51530998171. The next prime is 51530998231. The reversal of 51530998177 is 77189903515.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44140329216 + 7390668961 = 210096^2 + 85969^2 .

It is a cyclic number.

It is not a de Polignac number, because 51530998177 - 2²³ = 51522609569 is a prime.

It is not a weakly prime, because it can be changed into another prime (51530998171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25765499088 + 25765499089.

It is an arithmetic number, because the mean of its divisors is an integer number (25765499089).

Almost surely, 2^51530998177 is an apocalyptic number.

It is an amenable number.

51530998177 is a deficient number, since it is larger than the sum of its proper divisors (1).

51530998177 is an equidigital number, since it uses as much as digits as its factorization.

51530998177 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2381400, while the sum is 55.

The spelling of 51530998177 in words is "fifty-one billion, five hundred thirty million, nine hundred ninety-eight thousand, one hundred seventy-seven".