82468846561 has 4 divisors (see below), whose sum is σ = 82525605652. Its totient is φ = 82412087472.

The previous prime is 82468846547. The next prime is 82468846567. The reversal of 82468846561 is 16564886428.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 66993486561 + 15475360000 = 258831^2 + 124400^2 .

It is a cyclic number.

It is not a de Polignac number, because 82468846561 - 2³³ = 73878911969 is a prime.

It is a super-2 number, since 2×82468846561² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 82468846496 and 82468846505.

It is not an unprimeable number, because it can be changed into a prime (82468846567) 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, 28377366 + ... + 28380271.

It is an arithmetic number, because the mean of its divisors is an integer number (20631401413).

Almost surely, 2^82468846561 is an apocalyptic number.

It is an amenable number.

82468846561 is a deficient number, since it is larger than the sum of its proper divisors (56759091).

82468846561 is a wasteful number, since it uses less digits than its factorization.

82468846561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56759090.

The product of its digits is 17694720, while the sum is 58.

The spelling of 82468846561 in words is "eighty-two billion, four hundred sixty-eight million, eight hundred forty-six thousand, five hundred sixty-one".