23544543640 has 32 divisors (see below), whose sum is σ = 52983756000. Its totient is φ = 9416300544.

The previous prime is 23544543613. The next prime is 23544543667. The reversal of 23544543640 is 4634544532.

It is an interprime number because it is at equal distance from previous prime (23544543613) and next prime (23544543667).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 23544543593 and 23544543602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 223096 + ... + 311224.

It is an arithmetic number, because the mean of its divisors is an integer number (1655742375).

Almost surely, 2^23544543640 is an apocalyptic number.

23544543640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23544543640 is an abundant number, since it is smaller than the sum of its proper divisors (29439212360).

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

23544543640 is a wasteful number, since it uses less digits than its factorization.

23544543640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94819 (or 94815 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 40.

The spelling of 23544543640 in words is "twenty-three billion, five hundred forty-four million, five hundred forty-three thousand, six hundred forty".