684168851023 has 8 divisors (see below), whose sum is σ = 781912375200. Its totient is φ = 586426606080.

The previous prime is 684168851017. The next prime is 684168851117. The reversal of 684168851023 is 320158861486.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-684168851023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684168855023) 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, 1573563 + ... + 1960723.

It is an arithmetic number, because the mean of its divisors is an integer number (97739046900).

Almost surely, 2^684168851023 is an apocalyptic number.

684168851023 is a deficient number, since it is larger than the sum of its proper divisors (97743524177).

684168851023 is a wasteful number, since it uses less digits than its factorization.

684168851023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639617.

The product of its (nonzero) digits is 2211840, while the sum is 52.

The spelling of 684168851023 in words is "six hundred eighty-four billion, one hundred sixty-eight million, eight hundred fifty-one thousand, twenty-three".