2139579648 has 54 divisors (see below), whose sum is σ = 6168942234. Its totient is φ = 713192448.

The previous prime is 2139579643. The next prime is 2139579653. The reversal of 2139579648 is 8469759312.

2139579648 is a `hidden beast` number, since 2 + 1 + 3 + 9 + 579 + 64 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (2139579643) and next prime (2139579653).

It can be written as a sum of positive squares in only one way, i.e., 1808630784 + 330948864 = 42528^2 + 18192^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2139579594 and 2139579603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2139579643) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 462015 + ... + 466622.

It is an arithmetic number, because the mean of its divisors is an integer number (114239671).

Almost surely, 2^2139579648 is an apocalyptic number.

It is an amenable number.

2139579648 is an abundant number, since it is smaller than the sum of its proper divisors (4029362586).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2139579648 is an equidigital number, since it uses as much as digits as its factorization.

2139579648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 928659 (or 928642 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 54.

The square root of 2139579648 is about 46255.5904513173. The cubic root of 2139579648 is about 1288.5743615840.

The spelling of 2139579648 in words is "two billion, one hundred thirty-nine million, five hundred seventy-nine thousand, six hundred forty-eight".