1298109625616 has 10 divisors (see below), whose sum is σ = 2515087399662. Its totient is φ = 649054812800.

The previous prime is 1298109625601. The next prime is 1298109625663. The reversal of 1298109625616 is 6165269018921.

It can be written as a sum of positive squares in only one way, i.e., 1198192944400 + 99916681216 = 1094620^2 + 316096^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40565925785 + ... + 40565925816.

Almost surely, 2^{1298109625616} is an apocalyptic number.

1298109625616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1298109625616 is a deficient number, since it is larger than the sum of its proper divisors (1216977774046).

1298109625616 is an equidigital number, since it uses as much as digits as its factorization.

1298109625616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81131851609 (or 81131851603 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 56.

The spelling of 1298109625616 in words is "one trillion, two hundred ninety-eight billion, one hundred nine million, six hundred twenty-five thousand, six hundred sixteen".