2772478447 has 4 divisors (see below), whose sum is σ = 2772733680. Its totient is φ = 2772223216.

The previous prime is 2772478421. The next prime is 2772478469. The reversal of 2772478447 is 7448742772.

2772478447 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2772478447 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2772478394 and 2772478403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2772428447) 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, 110563 + ... + 133300.

It is an arithmetic number, because the mean of its divisors is an integer number (693183420).

Almost surely, 2^2772478447 is an apocalyptic number.

2772478447 is a deficient number, since it is larger than the sum of its proper divisors (255233).

2772478447 is a wasteful number, since it uses less digits than its factorization.

2772478447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255232.

The product of its digits is 4917248, while the sum is 52.

The square root of 2772478447 is about 52654.3298029706. The cubic root of 2772478447 is about 1404.8266140316.

The spelling of 2772478447 in words is "two billion, seven hundred seventy-two million, four hundred seventy-eight thousand, four hundred forty-seven".