2544621155 has 4 divisors (see below), whose sum is σ = 3053545392. Its totient is φ = 2035696920.

The previous prime is 2544621139. The next prime is 2544621179. The reversal of 2544621155 is 5511264452.

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

It is not a de Polignac number, because 2544621155 - 2⁴ = 2544621139 is a prime.

It is a Duffinian 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, 254462111 + ... + 254462120.

It is an arithmetic number, because the mean of its divisors is an integer number (763386348).

Almost surely, 2^2544621155 is an apocalyptic number.

2544621155 is a deficient number, since it is larger than the sum of its proper divisors (508924237).

2544621155 is an equidigital number, since it uses as much as digits as its factorization.

2544621155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508924236.

The product of its digits is 48000, while the sum is 35.

The square root of 2544621155 is about 50444.2380753243. The cubic root of 2544621155 is about 1365.2359353695.

The spelling of 2544621155 in words is "two billion, five hundred forty-four million, six hundred twenty-one thousand, one hundred fifty-five".