2052636661 has 16 divisors (see below), whose sum is σ = 2201482800. Its totient is φ = 1913670144.

The previous prime is 2052636659. The next prime is 2052636667. The reversal of 2052636661 is 1666362502.

It can be written as a sum of positive squares in 8 ways, for example, as 3025 + 2052633636 = 55^2 + 45306^2 .

It is not a de Polignac number, because 2052636661 - 2¹ = 2052636659 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2052636661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2052636667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 533601 + ... + 537433.

It is an arithmetic number, because the mean of its divisors is an integer number (137592675).

Almost surely, 2^2052636661 is an apocalyptic number.

It is an amenable number.

2052636661 is a deficient number, since it is larger than the sum of its proper divisors (148846139).

2052636661 is an equidigital number, since it uses as much as digits as its factorization.

2052636661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3993 (or 3959 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 37.

The square root of 2052636661 is about 45306.0333840869. The cubic root of 2052636661 is about 1270.8784838935.

The spelling of 2052636661 in words is "two billion, fifty-two million, six hundred thirty-six thousand, six hundred sixty-one".