23556475644 has 96 divisors (see below), whose sum is σ = 60085509120. Its totient is φ = 7139328768.

The previous prime is 23556475643. The next prime is 23556475661. The reversal of 23556475644 is 44657465532.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23556475643) 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 31 ways as a sum of consecutive naturals, for example, 5753262 + ... + 5757354.

It is an arithmetic number, because the mean of its divisors is an integer number (625890720).

Almost surely, 2^23556475644 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 23556475644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30042754560).

23556475644 is an abundant number, since it is smaller than the sum of its proper divisors (36529033476).

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

23556475644 is a wasteful number, since it uses less digits than its factorization.

23556475644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4659 (or 4657 counting only the distinct ones).

The product of its digits is 12096000, while the sum is 51.

The spelling of 23556475644 in words is "twenty-three billion, five hundred fifty-six million, four hundred seventy-five thousand, six hundred forty-four".