2646565387 has 4 divisors (see below), whose sum is σ = 2731938496. Its totient is φ = 2561192280.

The previous prime is 2646565379. The next prime is 2646565391. The reversal of 2646565387 is 7835656462.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7835656462 = 2 ⋅3917828231.

It is a cyclic number.

It is not a de Polignac number, because 2646565387 - 2³ = 2646565379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2646565367) 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, 42686508 + ... + 42686569.

It is an arithmetic number, because the mean of its divisors is an integer number (682984624).

Almost surely, 2^2646565387 is an apocalyptic number.

2646565387 is a deficient number, since it is larger than the sum of its proper divisors (85373109).

2646565387 is an equidigital number, since it uses as much as digits as its factorization.

2646565387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85373108.

The product of its digits is 7257600, while the sum is 52.

The square root of 2646565387 is about 51444.7799781474. The cubic root of 2646565387 is about 1383.2293946132.

The spelling of 2646565387 in words is "two billion, six hundred forty-six million, five hundred sixty-five thousand, three hundred eighty-seven".