23401451543505 has 192 divisors, whose sum is σ = 47852429875200. Its totient is φ = 9691830973440.

The previous prime is 23401451543489. The next prime is 23401451543527. The reversal of 23401451543505 is 50534515410432.

It is not a de Polignac number, because 23401451543505 - 2⁴ = 23401451543489 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 2402854926 + ... + 2402864664.

It is an arithmetic number, because the mean of its divisors is an integer number (249231405600).

Almost surely, 2^{23401451543505} is an apocalyptic number.

It is an amenable number.

23401451543505 is an abundant number, since it is smaller than the sum of its proper divisors (24450978331695).

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

23401451543505 is a wasteful number, since it uses less digits than its factorization.

23401451543505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17284 (or 17277 counting only the distinct ones).

The product of its (nonzero) digits is 720000, while the sum is 42.

Adding to 23401451543505 its reverse (50534515410432), we get a palindrome (73935966953937).

The spelling of 23401451543505 in words is "twenty-three trillion, four hundred one billion, four hundred fifty-one million, five hundred forty-three thousand, five hundred five".