319898827681 has 2 divisors, whose sum is σ = 319898827682. Its totient is φ = 319898827680.

The previous prime is 319898827673. The next prime is 319898827747. The reversal of 319898827681 is 186728898913.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 318106152081 + 1792675600 = 564009^2 + 42340^2 .

It is a cyclic number.

It is not a de Polignac number, because 319898827681 - 2³ = 319898827673 is a prime.

It is a super-2 number, since 2×319898827681² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 319898827681.

It is not a weakly prime, because it can be changed into another prime (319848827681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159949413840 + 159949413841.

It is an arithmetic number, because the mean of its divisors is an integer number (159949413841).

Almost surely, 2^319898827681 is an apocalyptic number.

It is an amenable number.

319898827681 is a deficient number, since it is larger than the sum of its proper divisors (1).

319898827681 is an equidigital number, since it uses as much as digits as its factorization.

319898827681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 83607552, while the sum is 70.

The spelling of 319898827681 in words is "three hundred nineteen billion, eight hundred ninety-eight million, eight hundred twenty-seven thousand, six hundred eighty-one".