23209545455 has 4 divisors (see below), whose sum is σ = 27851454552. Its totient is φ = 18567636360.

The previous prime is 23209545451. The next prime is 23209545523. The reversal of 23209545455 is 55454590232.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 23209545455 - 2² = 23209545451 is a prime.

It is a super-2 number, since 2×23209545455² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23209545451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2320954541 + ... + 2320954550.

It is an arithmetic number, because the mean of its divisors is an integer number (6962863638).

Almost surely, 2^23209545455 is an apocalyptic number.

23209545455 is a deficient number, since it is larger than the sum of its proper divisors (4641909097).

23209545455 is an equidigital number, since it uses as much as digits as its factorization.

23209545455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4641909096.

The product of its (nonzero) digits is 1080000, while the sum is 44.

The spelling of 23209545455 in words is "twenty-three billion, two hundred nine million, five hundred forty-five thousand, four hundred fifty-five".