82564549 has 4 divisors (see below), whose sum is σ = 86154336. Its totient is φ = 78974764.

The previous prime is 82564543. The next prime is 82564567. The reversal of 82564549 is 94546528.

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 82564549 - 2¹⁹ = 82040261 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 (82564543) 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, 1794859 + ... + 1794904.

It is an arithmetic number, because the mean of its divisors is an integer number (21538584).

Almost surely, 2^82564549 is an apocalyptic number.

It is an amenable number.

82564549 is a deficient number, since it is larger than the sum of its proper divisors (3589787).

82564549 is a wasteful number, since it uses less digits than its factorization.

82564549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3589786.

The product of its digits is 345600, while the sum is 43.

The square root of 82564549 is about 9086.5036730307. The cubic root of 82564549 is about 435.4428906234.

The spelling of 82564549 in words is "eighty-two million, five hundred sixty-four thousand, five hundred forty-nine".