2178956255 has 36 divisors (see below), whose sum is σ = 3081117672. Its totient is φ = 1474996320.

The previous prime is 2178956231. The next prime is 2178956257. The reversal of 2178956255 is 5526598712.

It is not a de Polignac number, because 2178956255 - 2¹⁰ = 2178955231 is a prime.

It is a super-2 number, since 2×2178956255² = 9495700722407250050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2178956257) by changing a digit.

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 35 ways as a sum of consecutive naturals, for example, 1687160 + ... + 1688450.

It is an arithmetic number, because the mean of its divisors is an integer number (85586602).

Almost surely, 2^2178956255 is an apocalyptic number.

2178956255 is a deficient number, since it is larger than the sum of its proper divisors (902161417).

2178956255 is an equidigital number, since it uses as much as digits as its factorization.

2178956255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1476 (or 1386 counting only the distinct ones).

The product of its digits is 1512000, while the sum is 50.

The square root of 2178956255 is about 46679.2915006216. The cubic root of 2178956255 is about 1296.4312882061.

The spelling of 2178956255 in words is "two billion, one hundred seventy-eight million, nine hundred fifty-six thousand, two hundred fifty-five".