82611227181 has 16 divisors (see below), whose sum is σ = 127656787968. Its totient is φ = 46541535600.

The previous prime is 82611227173. The next prime is 82611227189. The reversal of 82611227181 is 18172211628.

It is an interprime number because it is at equal distance from previous prime (82611227173) and next prime (82611227189).

It is not a de Polignac number, because 82611227181 - 2³ = 82611227173 is a prime.

It is a super-4 number, since 4×82611227181⁴ (a number of 45 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82611227189) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27701805 + ... + 27704786.

It is an arithmetic number, because the mean of its divisors is an integer number (7978549248).

Almost surely, 2^82611227181 is an apocalyptic number.

It is an amenable number.

82611227181 is a deficient number, since it is larger than the sum of its proper divisors (45045560787).

82611227181 is a wasteful number, since it uses less digits than its factorization.

82611227181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55406672.

The product of its digits is 21504, while the sum is 39.

The spelling of 82611227181 in words is "eighty-two billion, six hundred eleven million, two hundred twenty-seven thousand, one hundred eighty-one".