536646381 has 4 divisors (see below), whose sum is σ = 715528512. Its totient is φ = 357764252.

The previous prime is 536646323. The next prime is 536646413. The reversal of 536646381 is 183646635.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 536646381 - 2¹⁰ = 536645357 is a prime.

It is a super-3 number, since 3×536646381³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (536648381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89441061 + ... + 89441066.

It is an arithmetic number, because the mean of its divisors is an integer number (178882128).

Almost surely, 2^536646381 is an apocalyptic number.

It is an amenable number.

536646381 is a deficient number, since it is larger than the sum of its proper divisors (178882131).

536646381 is a wasteful number, since it uses less digits than its factorization.

536646381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178882130.

The product of its digits is 311040, while the sum is 42.

The square root of 536646381 is about 23165.6293029134. The cubic root of 536646381 is about 812.6360197051.

The spelling of 536646381 in words is "five hundred thirty-six million, six hundred forty-six thousand, three hundred eighty-one".