7798808720040 has 576 divisors, whose sum is σ = 27719270884800. Its totient is φ = 1748425236480.

The previous prime is 7798808720039. The next prime is 7798808720051. The reversal of 7798808720040 is 400278088977.

It is a happy number.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 331302591 + ... + 331326129.

It is an arithmetic number, because the mean of its divisors is an integer number (48123734175).

Almost surely, 2^{7798808720040} 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 7798808720040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13859635442400).

7798808720040 is an abundant number, since it is smaller than the sum of its proper divisors (19920462164760).

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

7798808720040 is a wasteful number, since it uses less digits than its factorization.

7798808720040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23658 (or 23610 counting only the distinct ones).

The product of its (nonzero) digits is 12644352, while the sum is 60.

The spelling of 7798808720040 in words is "seven trillion, seven hundred ninety-eight billion, eight hundred eight million, seven hundred twenty thousand, forty".