2647221478 has 16 divisors (see below), whose sum is σ = 4520157696. Its totient is φ = 1150965640.

The previous prime is 2647221461. The next prime is 2647221509. The reversal of 2647221478 is 8741227462.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2615326 + ... + 2616337.

It is an arithmetic number, because the mean of its divisors is an integer number (282509856).

Almost surely, 2^2647221478 is an apocalyptic number.

2647221478 is a deficient number, since it is larger than the sum of its proper divisors (1872936218).

2647221478 is a wasteful number, since it uses less digits than its factorization.

2647221478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5231699.

The product of its digits is 301056, while the sum is 43.

The square root of 2647221478 is about 51451.1562357932. The cubic root of 2647221478 is about 1383.3436873211.

The spelling of 2647221478 in words is "two billion, six hundred forty-seven million, two hundred twenty-one thousand, four hundred seventy-eight".