2640919468 has 36 divisors (see below), whose sum is σ = 5341171752. Its totient is φ = 1129203840.

The previous prime is 2640919441. The next prime is 2640919469. The reversal of 2640919468 is 8649190462.

It is a super-2 number, since 2×2640919468² = 13948911272922806048, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2640919469) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1404553 + ... + 1406431.

It is an arithmetic number, because the mean of its divisors is an integer number (148365882).

Almost surely, 2^2640919468 is an apocalyptic number.

It is an amenable number.

2640919468 is an abundant number, since it is smaller than the sum of its proper divisors (2700252284).

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

2640919468 is a wasteful number, since it uses less digits than its factorization.

2640919468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3790 (or 1909 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 49.

The square root of 2640919468 is about 51389.8770965645. The cubic root of 2640919468 is about 1382.2450797274.

The spelling of 2640919468 in words is "two billion, six hundred forty million, nine hundred nineteen thousand, four hundred sixty-eight".