2661444155 has 8 divisors (see below), whose sum is σ = 3197685600. Its totient is φ = 2126520256.

The previous prime is 2661444101. The next prime is 2661444199. The reversal of 2661444155 is 5514441662.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2661444155 - 2¹⁴ = 2661427771 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 324935 + ... + 333024.

It is an arithmetic number, because the mean of its divisors is an integer number (399710700).

Almost surely, 2^2661444155 is an apocalyptic number.

2661444155 is a deficient number, since it is larger than the sum of its proper divisors (536241445).

2661444155 is an equidigital number, since it uses as much as digits as its factorization.

2661444155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658773.

The product of its digits is 115200, while the sum is 38.

The square root of 2661444155 is about 51589.1864153720. The cubic root of 2661444155 is about 1385.8166852472.

The spelling of 2661444155 in words is "two billion, six hundred sixty-one million, four hundred forty-four thousand, one hundred fifty-five".