678698123089 has 8 divisors (see below), whose sum is σ = 775682828928. Its totient is φ = 581720375040.

The previous prime is 678698123087. The next prime is 678698123137. The reversal of 678698123089 is 980321896876.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 678698123089 - 2¹ = 678698123087 is a prime.

It is a super-2 number, since 2×678698123089² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (678698123087) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1528717 + ... + 1922074.

It is an arithmetic number, because the mean of its divisors is an integer number (96960353616).

Almost surely, 2^678698123089 is an apocalyptic number.

It is an amenable number.

678698123089 is a deficient number, since it is larger than the sum of its proper divisors (96984705839).

678698123089 is a wasteful number, since it uses less digits than its factorization.

678698123089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3478895.

The product of its (nonzero) digits is 62705664, while the sum is 67.

The spelling of 678698123089 in words is "six hundred seventy-eight billion, six hundred ninety-eight million, one hundred twenty-three thousand, eighty-nine".