5664521251 has 4 divisors (see below), whose sum is σ = 5859849600. Its totient is φ = 5469192904.

The previous prime is 5664521209. The next prime is 5664521267. The reversal of 5664521251 is 1521254665.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 5664521251 - 2⁷ = 5664521123 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 5664521251.

It is not an unprimeable number, because it can be changed into a prime (5664821251) 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, 97664131 + ... + 97664188.

It is an arithmetic number, because the mean of its divisors is an integer number (1464962400).

Almost surely, 2^5664521251 is an apocalyptic number.

5664521251 is a deficient number, since it is larger than the sum of its proper divisors (195328349).

5664521251 is a wasteful number, since it uses less digits than its factorization.

5664521251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195328348.

The product of its digits is 72000, while the sum is 37.

The square root of 5664521251 is about 75263.0138314963. The cubic root of 5664521251 is about 1782.6020575921.

The spelling of 5664521251 in words is "five billion, six hundred sixty-four million, five hundred twenty-one thousand, two hundred fifty-one".