2175778855 has 8 divisors (see below), whose sum is σ = 2611268064. Its totient is φ = 1740400800.

The previous prime is 2175778841. The next prime is 2175778861. The reversal of 2175778855 is 5588775712.

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

It is not a de Polignac number, because 2175778855 - 2⁵ = 2175778823 is a prime.

It is a super-2 number, since 2×2175778855² = 9468027251730222050, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2175778796 and 2175778805.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24085 + ... + 70225.

It is an arithmetic number, because the mean of its divisors is an integer number (326408508).

Almost surely, 2^2175778855 is an apocalyptic number.

2175778855 is a deficient number, since it is larger than the sum of its proper divisors (435489209).

2175778855 is an equidigital number, since it uses as much as digits as its factorization.

2175778855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55577.

The product of its digits is 5488000, while the sum is 55.

The square root of 2175778855 is about 46645.2447201213. The cubic root of 2175778855 is about 1295.8008204973.

The spelling of 2175778855 in words is "two billion, one hundred seventy-five million, seven hundred seventy-eight thousand, eight hundred fifty-five".