23117646678 has 128 divisors (see below), whose sum is σ = 55292461056. Its totient is φ = 6305040000.

The previous prime is 23117646677. The next prime is 23117646697. The reversal of 23117646678 is 87664671132.

It is a happy number.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 23117646678.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23117646677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 41503576 + ... + 41504132.

It is an arithmetic number, because the mean of its divisors is an integer number (431972352).

Almost surely, 2^23117646678 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23117646678, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27646230528).

23117646678 is an abundant number, since it is smaller than the sum of its proper divisors (32174814378).

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

23117646678 is a wasteful number, since it uses less digits than its factorization.

23117646678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 978.

The product of its digits is 2032128, while the sum is 51.

The spelling of 23117646678 in words is "twenty-three billion, one hundred seventeen million, six hundred forty-six thousand, six hundred seventy-eight".