536643261 has 24 divisors (see below), whose sum is σ = 966423744. Its totient is φ = 278775360.

The previous prime is 536643259. The next prime is 536643269. The reversal of 536643261 is 162346635.

536643261 is a `hidden beast` number, since 5 + 3 + 6 + 643 + 2 + 6 + 1 = 666.

It is not a de Polignac number, because 536643261 - 2¹ = 536643259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (536643269) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 386496 + ... + 387881.

It is an arithmetic number, because the mean of its divisors is an integer number (40267656).

Almost surely, 2^536643261 is an apocalyptic number.

It is an amenable number.

536643261 is a deficient number, since it is larger than the sum of its proper divisors (429780483).

536643261 is a wasteful number, since it uses less digits than its factorization.

536643261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774401 (or 774398 counting only the distinct ones).

The product of its digits is 77760, while the sum is 36.

The square root of 536643261 is about 23165.5619616706. The cubic root of 536643261 is about 812.6344448448.

Adding to 536643261 its reverse (162346635), we get a palindrome (698989896).

The spelling of 536643261 in words is "five hundred thirty-six million, six hundred forty-three thousand, two hundred sixty-one".