23641620464 has 80 divisors (see below), whose sum is σ = 57268477440. Its totient is φ = 9185191680.

The previous prime is 23641620463. The next prime is 23641620491. The reversal of 23641620464 is 46402614632.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23641620463) 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, 415562 + ... + 469014.

It is an arithmetic number, because the mean of its divisors is an integer number (715855968).

Almost surely, 2^23641620464 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 23641620464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28634238720).

23641620464 is an abundant number, since it is smaller than the sum of its proper divisors (33626856976).

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

23641620464 is a wasteful number, since it uses less digits than its factorization.

23641620464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53838 (or 53832 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 38.

The spelling of 23641620464 in words is "twenty-three billion, six hundred forty-one million, six hundred twenty thousand, four hundred sixty-four".