678591275989 has 4 divisors (see below), whose sum is σ = 740281392000. Its totient is φ = 616901159980.

The previous prime is 678591275981. The next prime is 678591276001. The reversal of 678591275989 is 989572195876.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 678591275989 - 2³ = 678591275981 is a prime.

It is a super-3 number, since 3×678591275989³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678591275981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30845057989 + ... + 30845058010.

It is an arithmetic number, because the mean of its divisors is an integer number (185070348000).

Almost surely, 2^678591275989 is an apocalyptic number.

It is an amenable number.

678591275989 is a deficient number, since it is larger than the sum of its proper divisors (61690116011).

678591275989 is a wasteful number, since it uses less digits than its factorization.

678591275989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61690116010.

The product of its digits is 685843200, while the sum is 76.

The spelling of 678591275989 in words is "six hundred seventy-eight billion, five hundred ninety-one million, two hundred seventy-five thousand, nine hundred eighty-nine".