5664272521 has 4 divisors (see below), whose sum is σ = 5760277200. Its totient is φ = 5568267844.

The previous prime is 5664272503. The next prime is 5664272531. The reversal of 5664272521 is 1252724665.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1252724665 = 5 ⋅250544933.

It is a cyclic number.

It is not a de Polignac number, because 5664272521 - 2¹⁷ = 5664141449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5664272531) 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, 48002251 + ... + 48002368.

It is an arithmetic number, because the mean of its divisors is an integer number (1440069300).

Almost surely, 2^5664272521 is an apocalyptic number.

It is an amenable number.

5664272521 is a deficient number, since it is larger than the sum of its proper divisors (96004679).

5664272521 is an equidigital number, since it uses as much as digits as its factorization.

5664272521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96004678.

The product of its digits is 201600, while the sum is 40.

The square root of 5664272521 is about 75261.3614080957. The cubic root of 5664272521 is about 1782.5759657666.

The spelling of 5664272521 in words is "five billion, six hundred sixty-four million, two hundred seventy-two thousand, five hundred twenty-one".