1298798317381 has 8 divisors (see below), whose sum is σ = 1343649362328. Its totient is φ = 1254574560000.

The previous prime is 1298798317373. The next prime is 1298798317423. The reversal of 1298798317381 is 1837138978921.

It can be written as a sum of positive squares in 4 ways, for example, as 40306986756 + 1258491330625 = 200766^2 + 1121825^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1298798317381 - 2³ = 1298798317373 is a prime.

It is a super-2 number, since 2×1298798317381² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1298798317301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156817680 + ... + 156825961.

It is an arithmetic number, because the mean of its divisors is an integer number (167956170291).

Almost surely, 2^{1298798317381} is an apocalyptic number.

It is an amenable number.

1298798317381 is a deficient number, since it is larger than the sum of its proper divisors (44851044947).

1298798317381 is a wasteful number, since it uses less digits than its factorization.

1298798317381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313643783.

The product of its digits is 36578304, while the sum is 67.

The spelling of 1298798317381 in words is "one trillion, two hundred ninety-eight billion, seven hundred ninety-eight million, three hundred seventeen thousand, three hundred eighty-one".