2611664646 has 16 divisors (see below), whose sum is σ = 5498241600. Its totient is φ = 824736168.

The previous prime is 2611664603. The next prime is 2611664681. The reversal of 2611664646 is 6464661162.

It is a junction number, because it is equal to n+sod(n) for n = 2611664598 and 2611664607.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11454556 + ... + 11454783.

It is an arithmetic number, because the mean of its divisors is an integer number (343640100).

Almost surely, 2^2611664646 is an apocalyptic number.

2611664646 is an abundant number, since it is smaller than the sum of its proper divisors (2886576954).

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

2611664646 is a wasteful number, since it uses less digits than its factorization.

2611664646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22909363.

The product of its digits is 248832, while the sum is 42.

The square root of 2611664646 is about 51104.4483973754. The cubic root of 2611664646 is about 1377.1221701935.

The spelling of 2611664646 in words is "two billion, six hundred eleven million, six hundred sixty-four thousand, six hundred forty-six".