2378655591 has 16 divisors (see below), whose sum is σ = 3430834176. Its totient is φ = 1457218656.

The previous prime is 2378655569. The next prime is 2378655599. The reversal of 2378655591 is 1955568732.

It is a happy number.

It is not a de Polignac number, because 2378655591 - 2⁶ = 2378655527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2378655599) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 128055 + ... + 145448.

It is an arithmetic number, because the mean of its divisors is an integer number (214427136).

Almost surely, 2^2378655591 is an apocalyptic number.

2378655591 is a deficient number, since it is larger than the sum of its proper divisors (1052178585).

2378655591 is a wasteful number, since it uses less digits than its factorization.

2378655591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273742.

The product of its digits is 2268000, while the sum is 51.

The square root of 2378655591 is about 48771.4628753332. The cubic root of 2378655591 is about 1334.8850057355.

The spelling of 2378655591 in words is "two billion, three hundred seventy-eight million, six hundred fifty-five thousand, five hundred ninety-one".