82564619 has 4 divisors (see below), whose sum is σ = 84122496. Its totient is φ = 81006744.

The previous prime is 82564607. The next prime is 82564627. The reversal of 82564619 is 91646528.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82564619 is a prime.

It is a super-2 number, since 2×82564619² = 13633832621230322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82564219) 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, 778859 + ... + 778964.

It is an arithmetic number, because the mean of its divisors is an integer number (21030624).

Almost surely, 2^82564619 is an apocalyptic number.

82564619 is a deficient number, since it is larger than the sum of its proper divisors (1557877).

82564619 is a wasteful number, since it uses less digits than its factorization.

82564619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1557876.

The product of its digits is 103680, while the sum is 41.

The square root of 82564619 is about 9086.5075248965. The cubic root of 82564619 is about 435.4430136826.

The spelling of 82564619 in words is "eighty-two million, five hundred sixty-four thousand, six hundred nineteen".