6878806518172 has 12 divisors (see below), whose sum is σ = 12125779374240. Its totient is φ = 3414298125536.

The previous prime is 6878806518169. The next prime is 6878806518191. The reversal of 6878806518172 is 2718156088786.

It is a super-2 number, since 2×6878806518172² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6878806518098 and 6878806518107.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6276282772 + ... + 6276283867.

It is an arithmetic number, because the mean of its divisors is an integer number (1010481614520).

Almost surely, 2^{6878806518172} is an apocalyptic number.

It is an amenable number.

6878806518172 is a deficient number, since it is larger than the sum of its proper divisors (5246972856068).

6878806518172 is a wasteful number, since it uses less digits than its factorization.

6878806518172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12552566780 (or 12552566778 counting only the distinct ones).

The product of its (nonzero) digits is 72253440, while the sum is 67.

The spelling of 6878806518172 in words is "six trillion, eight hundred seventy-eight billion, eight hundred six million, five hundred eighteen thousand, one hundred seventy-two".