2644646487 has 32 divisors (see below), whose sum is σ = 4164071424. Its totient is φ = 1461024000.

The previous prime is 2644646479. The next prime is 2644646491. The reversal of 2644646487 is 7846464462.

2644646487 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2644646487 - 2³ = 2644646479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2644646987) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1236483 + ... + 1238619.

It is an arithmetic number, because the mean of its divisors is an integer number (130127232).

Almost surely, 2^2644646487 is an apocalyptic number.

2644646487 is a deficient number, since it is larger than the sum of its proper divisors (1519424937).

2644646487 is a wasteful number, since it uses less digits than its factorization.

2644646487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4079.

The product of its digits is 6193152, while the sum is 51.

The square root of 2644646487 is about 51426.1265020029. The cubic root of 2644646487 is about 1382.8950089405.

The spelling of 2644646487 in words is "two billion, six hundred forty-four million, six hundred forty-six thousand, four hundred eighty-seven".