23193688644 has 144 divisors (see below), whose sum is σ = 69688178560. Its totient is φ = 6366366720.

The previous prime is 23193688571. The next prime is 23193688649. The reversal of 23193688644 is 44688639132.

23193688644 is a `hidden beast` number, since 231 + 9 + 368 + 8 + 6 + 44 = 666.

It is not an unprimeable number, because it can be changed into a prime (23193688649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 643452 + ... + 678540.

Almost surely, 2^23193688644 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23193688644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34844089280).

23193688644 is an abundant number, since it is smaller than the sum of its proper divisors (46494489916).

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

23193688644 is a wasteful number, since it uses less digits than its factorization.

23193688644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35210 (or 35205 counting only the distinct ones).

The product of its digits is 5971968, while the sum is 54.

It can be divided in two parts, 2319 and 3688644, that added together give a palindrome (3690963).

The spelling of 23193688644 in words is "twenty-three billion, one hundred ninety-three million, six hundred eighty-eight thousand, six hundred forty-four".