82455681 has 24 divisors (see below), whose sum is σ = 139519584. Its totient is φ = 42833280.

The previous prime is 82455677. The next prime is 82455683. The reversal of 82455681 is 18655428.

It is not a de Polignac number, because 82455681 - 2² = 82455677 is a prime.

It is a super-2 number, since 2×82455681² = 13597878658347522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (82455683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23880 + ... + 27113.

It is an arithmetic number, because the mean of its divisors is an integer number (5813316).

Almost surely, 2^82455681 is an apocalyptic number.

It is an amenable number.

82455681 is a deficient number, since it is larger than the sum of its proper divisors (57063903).

82455681 is a wasteful number, since it uses less digits than its factorization.

82455681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51021 (or 51014 counting only the distinct ones).

The product of its digits is 76800, while the sum is 39.

The square root of 82455681 is about 9080.5110539000. The cubic root of 82455681 is about 435.2514176139.

The spelling of 82455681 in words is "eighty-two million, four hundred fifty-five thousand, six hundred eighty-one".