6815353803880 has 32 divisors (see below), whose sum is σ = 15432218340840. Its totient is φ = 2708777560320.

The previous prime is 6815353803851. The next prime is 6815353803887. The reversal of 6815353803880 is 883083535186.

It can be written as a sum of positive squares in 4 ways, for example, as 5369313883684 + 1446039920196 = 2317178^2 + 1202514^2 .

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (6815353803887) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 542617431 + ... + 542629990.

Almost surely, 2^{6815353803880} is an apocalyptic number.

It is an amenable number.

6815353803880 is an abundant number, since it is smaller than the sum of its proper divisors (8616864536960).

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

6815353803880 is a wasteful number, since it uses less digits than its factorization.

6815353803880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1085247589 (or 1085247585 counting only the distinct ones).

The product of its (nonzero) digits is 16588800, while the sum is 58.

The spelling of 6815353803880 in words is "six trillion, eight hundred fifteen billion, three hundred fifty-three million, eight hundred three thousand, eight hundred eighty".