2536965661 has 6 divisors (see below), whose sum is σ = 2578955162. Its totient is φ = 2494989120.

The previous prime is 2536965659. The next prime is 2536965677. The reversal of 2536965661 is 1665696352.

2536965661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 1056640036 + 1480325625 = 32506^2 + 38475^2 .

It is not a de Polignac number, because 2536965661 - 2¹ = 2536965659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2536965601) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 390165 + ... + 396613.

Almost surely, 2^2536965661 is an apocalyptic number.

It is an amenable number.

2536965661 is a deficient number, since it is larger than the sum of its proper divisors (41989501).

2536965661 is an frugal number, since it uses more digits than its factorization.

2536965661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12959 (or 6510 counting only the distinct ones).

The product of its digits is 1749600, while the sum is 49.

The square root of 2536965661 is about 50368.3001599220. The cubic root of 2536965661 is about 1363.8654557581.

The spelling of 2536965661 in words is "two billion, five hundred thirty-six million, nine hundred sixty-five thousand, six hundred sixty-one".