23661036552 has 128 divisors (see below), whose sum is σ = 61551135360. Its totient is φ = 7574568960.

The previous prime is 23661036551. The next prime is 23661036559. The reversal of 23661036552 is 25563016632.

It is a self number, because there is not a number n which added to its sum of digits gives 23661036552.

It is not an unprimeable number, because it can be changed into a prime (23661036551) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15975652 + ... + 15977132.

It is an arithmetic number, because the mean of its divisors is an integer number (480868245).

Almost surely, 2^23661036552 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 23661036552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30775567680).

23661036552 is an abundant number, since it is smaller than the sum of its proper divisors (37890098808).

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

23661036552 is a wasteful number, since it uses less digits than its factorization.

23661036552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1783 (or 1779 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 39.

The spelling of 23661036552 in words is "twenty-three billion, six hundred sixty-one million, thirty-six thousand, five hundred fifty-two".