23991272455 has 4 divisors (see below), whose sum is σ = 28789526952. Its totient is φ = 19193017960.

The previous prime is 23991272441. The next prime is 23991272477. The reversal of 23991272455 is 55427219932.

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

It is not a de Polignac number, because 23991272455 - 2⁹ = 23991271943 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23991272399 and 23991272408.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2399127241 + ... + 2399127250.

It is an arithmetic number, because the mean of its divisors is an integer number (7197381738).

Almost surely, 2^23991272455 is an apocalyptic number.

23991272455 is a deficient number, since it is larger than the sum of its proper divisors (4798254497).

23991272455 is an equidigital number, since it uses as much as digits as its factorization.

23991272455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4798254496.

The product of its digits is 1360800, while the sum is 49.

The spelling of 23991272455 in words is "twenty-three billion, nine hundred ninety-one million, two hundred seventy-two thousand, four hundred fifty-five".