2656408647 has 8 divisors (see below), whose sum is σ = 3551375344. Its totient is φ = 1766190528.

The previous prime is 2656408583. The next prime is 2656408751. The reversal of 2656408647 is 7468046562.

2656408647 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 2656408647 - 2⁶ = 2656408583 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2656408596 and 2656408605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2656448647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1185838 + ... + 1188075.

It is an arithmetic number, because the mean of its divisors is an integer number (443921918).

Almost surely, 2^2656408647 is an apocalyptic number.

2656408647 is a deficient number, since it is larger than the sum of its proper divisors (894966697).

2656408647 is a wasteful number, since it uses less digits than its factorization.

2656408647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2374289.

The product of its (nonzero) digits is 1935360, while the sum is 48.

The square root of 2656408647 is about 51540.3593992126. The cubic root of 2656408647 is about 1384.9421354096.

The spelling of 2656408647 in words is "two billion, six hundred fifty-six million, four hundred eight thousand, six hundred forty-seven".