2641805636 has 12 divisors (see below), whose sum is σ = 4623826620. Its totient is φ = 1320712320.

The previous prime is 2641805557. The next prime is 2641805651. The reversal of 2641805636 is 6365081462.

It can be written as a sum of positive squares in 2 ways, for example, as 840652036 + 1801153600 = 28994^2 + 42440^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2641805593 and 2641805602.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13745 + ... + 73976.

It is an arithmetic number, because the mean of its divisors is an integer number (385318885).

Almost surely, 2^2641805636 is an apocalyptic number.

It is an amenable number.

2641805636 is a deficient number, since it is larger than the sum of its proper divisors (1982020984).

2641805636 is a wasteful number, since it uses less digits than its factorization.

2641805636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95254 (or 95252 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 41.

The square root of 2641805636 is about 51398.4983827349. The cubic root of 2641805636 is about 1382.3996678537.

The spelling of 2641805636 in words is "two billion, six hundred forty-one million, eight hundred five thousand, six hundred thirty-six".