23643640446 has 8 divisors (see below), whose sum is σ = 47287280904. Its totient is φ = 7881213480.

The previous prime is 23643640439. The next prime is 23643640453. The reversal of 23643640446 is 64404634632.

It is an interprime number because it is at equal distance from previous prime (23643640439) and next prime (23643640453).

It is a sphenic number, since it is the product of 3 distinct primes.

23643640446 is an admirable number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 23643640398 and 23643640407.

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, 1970303365 + ... + 1970303376.

It is an arithmetic number, because the mean of its divisors is an integer number (5910910113).

Almost surely, 2^23643640446 is an apocalyptic number.

23643640446 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

23643640446 is a wasteful number, since it uses less digits than its factorization.

23643640446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3940606746.

The product of its (nonzero) digits is 995328, while the sum is 42.

The spelling of 23643640446 in words is "twenty-three billion, six hundred forty-three million, six hundred forty thousand, four hundred forty-six".