23144121555 has 64 divisors (see below), whose sum is σ = 40477916160. Its totient is φ = 11246247936.

The previous prime is 23144121547. The next prime is 23144121571. The reversal of 23144121555 is 55512144132.

It is not a de Polignac number, because 23144121555 - 2³ = 23144121547 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1229706 + ... + 1248384.

It is an arithmetic number, because the mean of its divisors is an integer number (632467440).

Almost surely, 2^23144121555 is an apocalyptic number.

23144121555 is a deficient number, since it is larger than the sum of its proper divisors (17333794605).

23144121555 is a wasteful number, since it uses less digits than its factorization.

23144121555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18860.

The product of its digits is 24000, while the sum is 33.

Adding to 23144121555 its reverse (55512144132), we get a palindrome (78656265687).

The spelling of 23144121555 in words is "twenty-three billion, one hundred forty-four million, one hundred twenty-one thousand, five hundred fifty-five".