2639122378 has 8 divisors (see below), whose sum is σ = 3958955172. Its totient is φ = 1319470656.

The previous prime is 2639122331. The next prime is 2639122391. The reversal of 2639122378 is 8732219362.

It can be written as a sum of positive squares in 2 ways, for example, as 2582977329 + 56145049 = 50823^2 + 7493^2 .

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

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, 376 + ... + 72652.

Almost surely, 2^2639122378 is an apocalyptic number.

2639122378 is a deficient number, since it is larger than the sum of its proper divisors (1319832794).

2639122378 is a wasteful number, since it uses less digits than its factorization.

2639122378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90536.

The product of its digits is 217728, while the sum is 43.

The square root of 2639122378 is about 51372.3892572654. The cubic root of 2639122378 is about 1381.9314790422.

The spelling of 2639122378 in words is "two billion, six hundred thirty-nine million, one hundred twenty-two thousand, three hundred seventy-eight".