2640251384 has 8 divisors (see below), whose sum is σ = 4950471360. Its totient is φ = 1320125688.

The previous prime is 2640251377. The next prime is 2640251417. The reversal of 2640251384 is 4831520462.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165015704 + ... + 165015719.

It is an arithmetic number, because the mean of its divisors is an integer number (618808920).

Almost surely, 2^2640251384 is an apocalyptic number.

It is an amenable number.

2640251384 is a deficient number, since it is larger than the sum of its proper divisors (2310219976).

2640251384 is a wasteful number, since it uses less digits than its factorization.

2640251384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330031429 (or 330031425 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 35.

The square root of 2640251384 is about 51383.3765336612. The cubic root of 2640251384 is about 1382.1285125350.

The spelling of 2640251384 in words is "two billion, six hundred forty million, two hundred fifty-one thousand, three hundred eighty-four".