684162217723 has 16 divisors (see below), whose sum is σ = 696027496320. Its totient is φ = 672379029504.

The previous prime is 684162217709. The next prime is 684162217727. The reversal of 684162217723 is 327712261486.

It is a cyclic number.

It is not a de Polignac number, because 684162217723 - 2⁵ = 684162217691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (684162217727) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94847665 + ... + 94854877.

It is an arithmetic number, because the mean of its divisors is an integer number (43501718520).

Almost surely, 2^684162217723 is an apocalyptic number.

684162217723 is a deficient number, since it is larger than the sum of its proper divisors (11865278597).

684162217723 is a wasteful number, since it uses less digits than its factorization.

684162217723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12678.

The product of its digits is 1354752, while the sum is 49.

The spelling of 684162217723 in words is "six hundred eighty-four billion, one hundred sixty-two million, two hundred seventeen thousand, seven hundred twenty-three".