2618064640 has 36 divisors (see below), whose sum is σ = 6271086024. Its totient is φ = 1047225344.

The previous prime is 2618064637. The next prime is 2618064649. The reversal of 2618064640 is 464608162.

It is a self number, because there is not a number n which added to its sum of digits gives 2618064640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2618064649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1021402 + ... + 1023961.

It is an arithmetic number, because the mean of its divisors is an integer number (174196834).

Almost surely, 2^2618064640 is an apocalyptic number.

2618064640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2618064640 is an abundant number, since it is smaller than the sum of its proper divisors (3653021384).

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

2618064640 is an equidigital number, since it uses as much as digits as its factorization.

2618064640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2045384 (or 2045370 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 37.

The square root of 2618064640 is about 51167.0268825540. The cubic root of 2618064640 is about 1378.2461511611.

The spelling of 2618064640 in words is "two billion, six hundred eighteen million, sixty-four thousand, six hundred forty".