2640613444 has 48 divisors (see below), whose sum is σ = 5478842880. Its totient is φ = 1089567360.

The previous prime is 2640613429. The next prime is 2640613453. The reversal of 2640613444 is 4443160462.

It is a super-2 number, since 2×2640613444² = 13945678721267082272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 293574 + ... + 302434.

It is an arithmetic number, because the mean of its divisors is an integer number (114142560).

Almost surely, 2^2640613444 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2640613444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2739421440).

2640613444 is an abundant number, since it is smaller than the sum of its proper divisors (2838229436).

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

2640613444 is a wasteful number, since it uses less digits than its factorization.

2640613444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9268 (or 9266 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 34.

The square root of 2640613444 is about 51386.8995367496. The cubic root of 2640613444 is about 1382.1916871478.

The spelling of 2640613444 in words is "two billion, six hundred forty million, six hundred thirteen thousand, four hundred forty-four".