82642645 has 8 divisors (see below), whose sum is σ = 101851704. Its totient is φ = 64327104.

The previous prime is 82642639. The next prime is 82642667. The reversal of 82642645 is 54624628.

It can be written as a sum of positive squares in 4 ways, for example, as 26122321 + 56520324 = 5111^2 + 7518^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 82642645 - 2⁵ = 82642613 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 223174 + ... + 223543.

It is an arithmetic number, because the mean of its divisors is an integer number (12731463).

Almost surely, 2^82642645 is an apocalyptic number.

It is an amenable number.

82642645 is a deficient number, since it is larger than the sum of its proper divisors (19209059).

82642645 is a wasteful number, since it uses less digits than its factorization.

82642645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446759.

The product of its digits is 92160, while the sum is 37.

The square root of 82642645 is about 9090.8000198002. The cubic root of 82642645 is about 435.5801393259.

The spelling of 82642645 in words is "eighty-two million, six hundred forty-two thousand, six hundred forty-five".