2639478711 has 4 divisors (see below), whose sum is σ = 3519304952. Its totient is φ = 1759652472.

The previous prime is 2639478707. The next prime is 2639478733. The reversal of 2639478711 is 1178749362.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2639478711 - 2² = 2639478707 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2639478791) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 439913116 + ... + 439913121.

It is an arithmetic number, because the mean of its divisors is an integer number (879826238).

Almost surely, 2^2639478711 is an apocalyptic number.

2639478711 is a deficient number, since it is larger than the sum of its proper divisors (879826241).

2639478711 is an equidigital number, since it uses as much as digits as its factorization.

2639478711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 879826240.

The product of its digits is 508032, while the sum is 48.

The square root of 2639478711 is about 51375.8572775190. The cubic root of 2639478711 is about 1381.9936721451.

The spelling of 2639478711 in words is "two billion, six hundred thirty-nine million, four hundred seventy-eight thousand, seven hundred eleven".