23533145555 has 4 divisors (see below), whose sum is σ = 28239774672. Its totient is φ = 18826516440.

The previous prime is 23533145551. The next prime is 23533145563. The reversal of 23533145555 is 55554133532.

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

It is not a de Polignac number, because 23533145555 - 2² = 23533145551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23533145551) 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, 2353314551 + ... + 2353314560.

It is an arithmetic number, because the mean of its divisors is an integer number (7059943668).

Almost surely, 2^23533145555 is an apocalyptic number.

23533145555 is a deficient number, since it is larger than the sum of its proper divisors (4706629117).

23533145555 is an equidigital number, since it uses as much as digits as its factorization.

23533145555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4706629116.

The product of its digits is 675000, while the sum is 41.

The spelling of 23533145555 in words is "twenty-three billion, five hundred thirty-three million, one hundred forty-five thousand, five hundred fifty-five".