23561657012 has 12 divisors (see below), whose sum is σ = 42562993536. Its totient is φ = 11400801720.

The previous prime is 23561657011. The next prime is 23561657023. The reversal of 23561657012 is 21075616532.

It is a happy number.

It is a super-2 number, since 2×23561657012² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23561657011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95006558 + ... + 95006805.

It is an arithmetic number, because the mean of its divisors is an integer number (3546916128).

Almost surely, 2^23561657012 is an apocalyptic number.

It is an amenable number.

23561657012 is a deficient number, since it is larger than the sum of its proper divisors (19001336524).

23561657012 is a wasteful number, since it uses less digits than its factorization.

23561657012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190013398 (or 190013396 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 38.

The spelling of 23561657012 in words is "twenty-three billion, five hundred sixty-one million, six hundred fifty-seven thousand, twelve".