678401122344 has 64 divisors (see below), whose sum is σ = 1856021653440. Its totient is φ = 204927567360.

The previous prime is 678401122339. The next prime is 678401122411. The reversal of 678401122344 is 443221104876.

It is a junction number, because it is equal to n+sod(n) for n = 678401122296 and 678401122305.

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, 3969469 + ... + 4136844.

It is an arithmetic number, because the mean of its divisors is an integer number (29000338335).

Almost surely, 2^678401122344 is an apocalyptic number.

It is an amenable number.

678401122344 is an abundant number, since it is smaller than the sum of its proper divisors (1177620531096).

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

678401122344 is a wasteful number, since it uses less digits than its factorization.

678401122344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8106650 (or 8106646 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 42.

It can be divided in two parts, 678401 and 122344, that added together give a triangular number (800745 = T₁₂₆₅).

The spelling of 678401122344 in words is "six hundred seventy-eight billion, four hundred one million, one hundred twenty-two thousand, three hundred forty-four".