198315244277 has 2 divisors, whose sum is σ = 198315244278. Its totient is φ = 198315244276.

The previous prime is 198315244247. The next prime is 198315244289. The reversal of 198315244277 is 772442513891.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 139940335396 + 58374908881 = 374086^2 + 241609^2 .

It is a cyclic number.

It is not a de Polignac number, because 198315244277 - 2¹⁶ = 198315178741 is a prime.

It is a super-2 number, since 2×198315244277² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198315244247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99157622138 + 99157622139.

It is an arithmetic number, because the mean of its divisors is an integer number (99157622139).

Almost surely, 2^198315244277 is an apocalyptic number.

It is an amenable number.

198315244277 is a deficient number, since it is larger than the sum of its proper divisors (1).

198315244277 is an equidigital number, since it uses as much as digits as its factorization.

198315244277 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3386880, while the sum is 53.

The spelling of 198315244277 in words is "one hundred ninety-eight billion, three hundred fifteen million, two hundred forty-four thousand, two hundred seventy-seven".