678915591012 has 72 divisors (see below), whose sum is σ = 1821842620416. Its totient is φ = 212436935424.

The previous prime is 678915591001. The next prime is 678915591023. The reversal of 678915591012 is 210195519876.

It is a happy number.

678915591012 is a `hidden beast` number, since 6 + 7 + 89 + 1 + 559 + 1 + 0 + 1 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (678915591001) and next prime (678915591023).

It is a self number, because there is not a number n which added to its sum of digits gives 678915591012.

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, 1213828 + ... + 1682619.

It is an arithmetic number, because the mean of its divisors is an integer number (25303369728).

Almost surely, 2^678915591012 is an apocalyptic number.

It is an amenable number.

678915591012 is an abundant number, since it is smaller than the sum of its proper divisors (1142927029404).

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

678915591012 is a wasteful number, since it uses less digits than its factorization.

678915591012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2896857 (or 2896852 counting only the distinct ones).

The product of its (nonzero) digits is 1360800, while the sum is 54.

The spelling of 678915591012 in words is "six hundred seventy-eight billion, nine hundred fifteen million, five hundred ninety-one thousand, twelve".