23431664543 has 8 divisors (see below), whose sum is σ = 26794601088. Its totient is φ = 20072616984.

The previous prime is 23431664539. The next prime is 23431664549. The reversal of 23431664543 is 34546613432.

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

It is not a de Polignac number, because 23431664543 - 2² = 23431664539 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23431664543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23431664549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 959321 + ... + 983442.

It is an arithmetic number, because the mean of its divisors is an integer number (3349325136).

Almost surely, 2^23431664543 is an apocalyptic number.

23431664543 is a deficient number, since it is larger than the sum of its proper divisors (3362936545).

23431664543 is a wasteful number, since it uses less digits than its factorization.

23431664543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1944493.

The product of its digits is 622080, while the sum is 41.

The spelling of 23431664543 in words is "twenty-three billion, four hundred thirty-one million, six hundred sixty-four thousand, five hundred forty-three".