1002798659808 has 672 divisors, whose sum is σ = 3438763372800. Its totient is φ = 284526950400.

The previous prime is 1002798659791. The next prime is 1002798659867. The reversal of 1002798659808 is 8089568972001.

It is a happy number.

1002798659808 is a `hidden beast` number, since 10 + 0 + 27 + 9 + 8 + 6 + 598 + 0 + 8 = 666.

It is a super-2 number, since 2×1002798659808² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 433922973 + ... + 433925283.

It is an arithmetic number, because the mean of its divisors is an integer number (5117207400).

Almost surely, 2^{1002798659808} is an apocalyptic number.

1002798659808 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1002798659808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1719381686400).

1002798659808 is an abundant number, since it is smaller than the sum of its proper divisors (2435964712992).

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

1002798659808 is a wasteful number, since it uses less digits than its factorization.

1002798659808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2458 (or 2435 counting only the distinct ones).

The product of its (nonzero) digits is 17418240, while the sum is 63.

The spelling of 1002798659808 in words is "one trillion, two billion, seven hundred ninety-eight million, six hundred fifty-nine thousand, eight hundred eight".