1298109597780 has 24 divisors (see below), whose sum is σ = 3634706873952. Its totient is φ = 346162559392.

The previous prime is 1298109597703. The next prime is 1298109597787. The reversal of 1298109597780 is 877959018921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1298109597787) 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 7 ways as a sum of consecutive naturals, for example, 10817579922 + ... + 10817580041.

It is an arithmetic number, because the mean of its divisors is an integer number (151446119748).

Almost surely, 2^{1298109597780} is an apocalyptic number.

1298109597780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1298109597780 is an abundant number, since it is smaller than the sum of its proper divisors (2336597276172).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1298109597780 is a wasteful number, since it uses less digits than its factorization.

1298109597780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21635159975 (or 21635159973 counting only the distinct ones).

The product of its (nonzero) digits is 22861440, while the sum is 66.

The spelling of 1298109597780 in words is "one trillion, two hundred ninety-eight billion, one hundred nine million, five hundred ninety-seven thousand, seven hundred eighty".