82644553 has 4 divisors (see below), whose sum is σ = 83417040. Its totient is φ = 81872068.

The previous prime is 82644533. The next prime is 82644559. The reversal of 82644553 is 35544628.

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 82644553 - 2⁵ = 82644521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82644559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 386083 + ... + 386296.

It is an arithmetic number, because the mean of its divisors is an integer number (20854260).

Almost surely, 2^82644553 is an apocalyptic number.

It is an amenable number.

82644553 is a deficient number, since it is larger than the sum of its proper divisors (772487).

82644553 is a wasteful number, since it uses less digits than its factorization.

82644553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 772486.

The product of its digits is 115200, while the sum is 37.

The square root of 82644553 is about 9090.9049604536. The cubic root of 82644553 is about 435.5834914310.

The spelling of 82644553 in words is "eighty-two million, six hundred forty-four thousand, five hundred fifty-three".