23453663640 has 128 divisors (see below), whose sum is σ = 78390789120. Its totient is φ = 5564748800.

The previous prime is 23453663581. The next prime is 23453663647. The reversal of 23453663640 is 4636635432.

It is a junction number, because it is equal to n+sod(n) for n = 23453663592 and 23453663601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23453663647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 126981 + ... + 251060.

It is an arithmetic number, because the mean of its divisors is an integer number (612428040).

Almost surely, 2^23453663640 is an apocalyptic number.

23453663640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23453663640 is an abundant number, since it is smaller than the sum of its proper divisors (54937125480).

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

23453663640 is a wasteful number, since it uses less digits than its factorization.

23453663640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378113 (or 378109 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 42.

The spelling of 23453663640 in words is "twenty-three billion, four hundred fifty-three million, six hundred sixty-three thousand, six hundred forty".