678804269616 has 60 divisors (see below), whose sum is σ = 2072410009800. Its totient is φ = 205698263040.

The previous prime is 678804269587. The next prime is 678804269629. The reversal of 678804269616 is 616962408876.

678804269616 is a `hidden beast` number, since 6 + 7 + 8 + 8 + 0 + 4 + 2 + 6 + 9 + 616 = 666.

It is a super-2 number, since 2×678804269616² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 214267441 + ... + 214270608.

It is an arithmetic number, because the mean of its divisors is an integer number (34540166830).

Almost surely, 2^678804269616 is an apocalyptic number.

678804269616 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

678804269616 is an abundant number, since it is smaller than the sum of its proper divisors (1393605740184).

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

678804269616 is a wasteful number, since it uses less digits than its factorization.

678804269616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428538074 (or 428538065 counting only the distinct ones).

The product of its (nonzero) digits is 41803776, while the sum is 63.

The spelling of 678804269616 in words is "six hundred seventy-eight billion, eight hundred four million, two hundred sixty-nine thousand, six hundred sixteen".