2640398676 has 12 divisors (see below), whose sum is σ = 6160930272. Its totient is φ = 880132888.

The previous prime is 2640398659. The next prime is 2640398687. The reversal of 2640398676 is 6768930462.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110016600 + ... + 110016623.

It is an arithmetic number, because the mean of its divisors is an integer number (513410856).

Almost surely, 2^2640398676 is an apocalyptic number.

It is an amenable number.

2640398676 is an abundant number, since it is smaller than the sum of its proper divisors (3520531596).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2640398676 is a wasteful number, since it uses less digits than its factorization.

2640398676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220033230 (or 220033228 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 51.

The square root of 2640398676 is about 51384.8097787663. The cubic root of 2640398676 is about 1382.1542137098.

The spelling of 2640398676 in words is "two billion, six hundred forty million, three hundred ninety-eight thousand, six hundred seventy-six".