2661511648 has 24 divisors (see below), whose sum is σ = 5261790240. Its totient is φ = 1325184000.

The previous prime is 2661511637. The next prime is 2661511649. The reversal of 2661511648 is 8461151662.

2661511648 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 2661511648.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2661511649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166353 + ... + 181648.

It is an arithmetic number, because the mean of its divisors is an integer number (219241260).

Almost surely, 2^2661511648 is an apocalyptic number.

It is an amenable number.

2661511648 is a deficient number, since it is larger than the sum of its proper divisors (2600278592).

2661511648 is a wasteful number, since it uses less digits than its factorization.

2661511648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348250 (or 348242 counting only the distinct ones).

The product of its digits is 69120, while the sum is 40.

The square root of 2661511648 is about 51589.8405502479. The cubic root of 2661511648 is about 1385.8283997062.

The spelling of 2661511648 in words is "two billion, six hundred sixty-one million, five hundred eleven thousand, six hundred forty-eight".