1298195581049 has 4 divisors (see below), whose sum is σ = 1298201661264. Its totient is φ = 1298189500836.

The previous prime is 1298195580989. The next prime is 1298195581057. The reversal of 1298195581049 is 9401855918921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1298195581049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1298195580982 and 1298195581000.

It is not an unprimeable number, because it can be changed into a prime (1298195581069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2707727 + ... + 3150900.

It is an arithmetic number, because the mean of its divisors is an integer number (324550415316).

Almost surely, 2^{1298195581049} is an apocalyptic number.

It is an amenable number.

1298195581049 is a deficient number, since it is larger than the sum of its proper divisors (6080215).

1298195581049 is an equidigital number, since it uses as much as digits as its factorization.

1298195581049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6080214.

The product of its (nonzero) digits is 9331200, while the sum is 62.

The spelling of 1298195581049 in words is "one trillion, two hundred ninety-eight billion, one hundred ninety-five million, five hundred eighty-one thousand, forty-nine".