1298109625601 has 2 divisors, whose sum is σ = 1298109625602. Its totient is φ = 1298109625600.

The previous prime is 1298109625583. The next prime is 1298109625663. The reversal of 1298109625601 is 1065269018921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 914978337025 + 383131288576 = 956545^2 + 618976^2 .

It is a cyclic number.

It is not a de Polignac number, because 1298109625601 - 2²² = 1298105431297 is a prime.

It is a super-2 number, since 2×1298109625601² (a number of 25 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 1298109625601.

It is not a weakly prime, because it can be changed into another prime (1298109624601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 649054812800 + 649054812801.

It is an arithmetic number, because the mean of its divisors is an integer number (649054812801).

Almost surely, 2^{1298109625601} is an apocalyptic number.

It is an amenable number.

1298109625601 is a deficient number, since it is larger than the sum of its proper divisors (1).

1298109625601 is an equidigital number, since it uses as much as digits as its factorization.

1298109625601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 466560, while the sum is 50.

The spelling of 1298109625601 in words is "one trillion, two hundred ninety-eight billion, one hundred nine million, six hundred twenty-five thousand, six hundred one".