23556047155 has 4 divisors (see below), whose sum is σ = 28267256592. Its totient is φ = 18844837720.

The previous prime is 23556047153. The next prime is 23556047189. The reversal of 23556047155 is 55174065532.

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

It is not a de Polignac number, because 23556047155 - 2¹ = 23556047153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23556047153) 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, 2355604711 + ... + 2355604720.

It is an arithmetic number, because the mean of its divisors is an integer number (7066814148).

Almost surely, 2^23556047155 is an apocalyptic number.

23556047155 is a deficient number, since it is larger than the sum of its proper divisors (4711209437).

23556047155 is an equidigital number, since it uses as much as digits as its factorization.

23556047155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4711209436.

The product of its (nonzero) digits is 630000, while the sum is 43.

The spelling of 23556047155 in words is "twenty-three billion, five hundred fifty-six million, forty-seven thousand, one hundred fifty-five".