6778959824855 has 16 divisors (see below), whose sum is σ = 8333997496704. Its totient is φ = 5290642402080.

The previous prime is 6778959824809. The next prime is 6778959824867. The reversal of 6778959824855 is 5584289598776.

It is a de Polignac number, because none of the positive numbers 2^k-6778959824855 is a prime.

It is a super-3 number, since 3×6778959824855³ (a number of 39 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

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, 18885101 + ... + 19240710.

It is an arithmetic number, because the mean of its divisors is an integer number (520874843544).

Almost surely, 2^{6778959824855} is an apocalyptic number.

6778959824855 is a deficient number, since it is larger than the sum of its proper divisors (1555037671849).

6778959824855 is a wasteful number, since it uses less digits than its factorization.

6778959824855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38126686.

The product of its digits is 12192768000, while the sum is 83.

The spelling of 6778959824855 in words is "six trillion, seven hundred seventy-eight billion, nine hundred fifty-nine million, eight hundred twenty-four thousand, eight hundred fifty-five".