2642756647 has 2 divisors, whose sum is σ = 2642756648. Its totient is φ = 2642756646.

The previous prime is 2642756621. The next prime is 2642756663. The reversal of 2642756647 is 7466572462.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2642756647 - 2¹¹ = 2642754599 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2642756647.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2642756617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1321378323 + 1321378324.

It is an arithmetic number, because the mean of its divisors is an integer number (1321378324).

Almost surely, 2^2642756647 is an apocalyptic number.

2642756647 is a deficient number, since it is larger than the sum of its proper divisors (1).

2642756647 is an equidigital number, since it uses as much as digits as its factorization.

2642756647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3386880, while the sum is 49.

The square root of 2642756647 is about 51407.7489003360. The cubic root of 2642756647 is about 1382.5655291052.

The spelling of 2642756647 in words is "two billion, six hundred forty-two million, seven hundred fifty-six thousand, six hundred forty-seven".