7782579855408 has 80 divisors (see below), whose sum is σ = 21292392887136. Its totient is φ = 2441049108480.

The previous prime is 7782579855389. The next prime is 7782579855461. The reversal of 7782579855408 is 8045589752877.

It is a self number, because there is not a number n which added to its sum of digits gives 7782579855408.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2604918 + ... + 4727658.

Almost surely, 2^{7782579855408} is an apocalyptic number.

It is an amenable number.

7782579855408 is an abundant number, since it is smaller than the sum of its proper divisors (13509813031728).

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

7782579855408 is a wasteful number, since it uses less digits than its factorization.

7782579855408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2127262 (or 2127256 counting only the distinct ones).

The product of its (nonzero) digits is 1580544000, while the sum is 75.

The spelling of 7782579855408 in words is "seven trillion, seven hundred eighty-two billion, five hundred seventy-nine million, eight hundred fifty-five thousand, four hundred eight".