678898639068 has 48 divisors (see below), whose sum is σ = 1713600516096. Its totient is φ = 207955143360.

The previous prime is 678898639063. The next prime is 678898639087. The reversal of 678898639068 is 860936898876.

It is a Harshad number since it is a multiple of its sum of digits (78).

It is a junction number, because it is equal to n+sod(n) for n = 678898638984 and 678898639002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678898639063) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9722868 + ... + 9792443.

It is an arithmetic number, because the mean of its divisors is an integer number (35700010752).

Almost surely, 2^678898639068 is an apocalyptic number.

It is an amenable number.

678898639068 is an abundant number, since it is smaller than the sum of its proper divisors (1034701877028).

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

678898639068 is a wasteful number, since it uses less digits than its factorization.

678898639068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19515554 (or 19515552 counting only the distinct ones).

The product of its (nonzero) digits is 1504935936, while the sum is 78.

The spelling of 678898639068 in words is "six hundred seventy-eight billion, eight hundred ninety-eight million, six hundred thirty-nine thousand, sixty-eight".