1298978744425 has 6 divisors (see below), whose sum is σ = 1610733643118. Its totient is φ = 1039182995520.

The previous prime is 1298978744423. The next prime is 1298978744429. The reversal of 1298978744425 is 5244478798921.

It can be written as a sum of positive squares in 3 ways, for example, as 237726455184 + 1061252289241 = 487572^2 + 1030171^2 .

It is not a de Polignac number, because 1298978744425 - 2¹ = 1298978744423 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1298978744423) 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 5 ways as a sum of consecutive naturals, for example, 25979574864 + ... + 25979574913.

Almost surely, 2^{1298978744425} is an apocalyptic number.

It is an amenable number.

1298978744425 is a deficient number, since it is larger than the sum of its proper divisors (311754898693).

1298978744425 is an equidigital number, since it uses as much as digits as its factorization.

1298978744425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51959149787 (or 51959149782 counting only the distinct ones).

The product of its digits is 325140480, while the sum is 70.

The spelling of 1298978744425 in words is "one trillion, two hundred ninety-eight billion, nine hundred seventy-eight million, seven hundred forty-four thousand, four hundred twenty-five".