678252896946 has 48 divisors (see below), whose sum is σ = 1489332536640. Its totient is φ = 223056839520.

The previous prime is 678252896911. The next prime is 678252896953. The reversal of 678252896946 is 649698252876.

It is a happy number.

678252896946 is a `hidden beast` number, since 6 + 7 + 8 + 2 + 528 + 9 + 6 + 94 + 6 = 666.

It is a super-2 number, since 2×678252896946² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 181260 + ... + 1178711.

It is an arithmetic number, because the mean of its divisors is an integer number (31027761180).

Almost surely, 2^678252896946 is an apocalyptic number.

678252896946 is an abundant number, since it is smaller than the sum of its proper divisors (811079639694).

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

678252896946 is a wasteful number, since it uses less digits than its factorization.

678252896946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1360351 (or 1360348 counting only the distinct ones).

The product of its digits is 627056640, while the sum is 72.

The spelling of 678252896946 in words is "six hundred seventy-eight billion, two hundred fifty-two million, eight hundred ninety-six thousand, nine hundred forty-six".