23561323640 has 16 divisors (see below), whose sum is σ = 53012978280. Its totient is φ = 9424529440.

The previous prime is 23561323633. The next prime is 23561323663. The reversal of 23561323640 is 4632316532.

It is a self number, because there is not a number n which added to its sum of digits gives 23561323640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 294516506 + ... + 294516585.

Almost surely, 2^23561323640 is an apocalyptic number.

23561323640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23561323640 is an abundant number, since it is smaller than the sum of its proper divisors (29451654640).

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

23561323640 is a wasteful number, since it uses less digits than its factorization.

23561323640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589033102 (or 589033098 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 35.

The spelling of 23561323640 in words is "twenty-three billion, five hundred sixty-one million, three hundred twenty-three thousand, six hundred forty".