1298865245808 has 160 divisors (see below), whose sum is σ = 3744385344000. Its totient is φ = 385222376448.

The previous prime is 1298865245803. The next prime is 1298865245819. The reversal of 1298865245808 is 8085425688921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1298865245803) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10779591 + ... + 10899417.

It is an arithmetic number, because the mean of its divisors is an integer number (23402408400).

Almost surely, 2^{1298865245808} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1298865245808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1872192672000).

1298865245808 is an abundant number, since it is smaller than the sum of its proper divisors (2445520098192).

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

1298865245808 is a wasteful number, since it uses less digits than its factorization.

1298865245808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120479 (or 120473 counting only the distinct ones).

The product of its (nonzero) digits is 88473600, while the sum is 66.

The spelling of 1298865245808 in words is "one trillion, two hundred ninety-eight billion, eight hundred sixty-five million, two hundred forty-five thousand, eight hundred eight".