2661604311616 has 28 divisors (see below), whose sum is σ = 5511256756992. Its totient is φ = 1272941191808.

The previous prime is 2661604311529. The next prime is 2661604311617. The reversal of 2661604311616 is 6161134061662.

2661604311616 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×2661604311616² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2661604311617) 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, 904076080 + ... + 904079023.

It is an arithmetic number, because the mean of its divisors is an integer number (196830598464).

Almost surely, 2^{2661604311616} is an apocalyptic number.

It is an amenable number.

2661604311616 is an abundant number, since it is smaller than the sum of its proper divisors (2849652445376).

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

2661604311616 is a wasteful number, since it uses less digits than its factorization.

2661604311616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1808155138 (or 1808155128 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 43.

The spelling of 2661604311616 in words is "two trillion, six hundred sixty-one billion, six hundred four million, three hundred eleven thousand, six hundred sixteen".