2544155623 has 4 divisors (see below), whose sum is σ = 2562726240. Its totient is φ = 2525585008.

The previous prime is 2544155573. The next prime is 2544155633. The reversal of 2544155623 is 3265514452.

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

It is a cyclic number.

It is not a de Polignac number, because 2544155623 - 2²⁹ = 2007284711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2544155633) 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, 9285103 + ... + 9285376.

It is an arithmetic number, because the mean of its divisors is an integer number (640681560).

Almost surely, 2^2544155623 is an apocalyptic number.

2544155623 is a deficient number, since it is larger than the sum of its proper divisors (18570617).

2544155623 is a wasteful number, since it uses less digits than its factorization.

2544155623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18570616.

The product of its digits is 144000, while the sum is 37.

The square root of 2544155623 is about 50439.6235414183. The cubic root of 2544155623 is about 1365.1526748055.

The spelling of 2544155623 in words is "two billion, five hundred forty-four million, one hundred fifty-five thousand, six hundred twenty-three".