82981771669 has 4 divisors (see below), whose sum is σ = 82983146944. Its totient is φ = 82980396396.

The previous prime is 82981771651. The next prime is 82981771681. The reversal of 82981771669 is 96617718928.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 82981771669 - 2¹⁵ = 82981738901 is a prime.

It is a super-2 number, since 2×82981771669² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 82981771669.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82981771469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 592767 + ... + 719260.

It is an arithmetic number, because the mean of its divisors is an integer number (20745786736).

Almost surely, 2^82981771669 is an apocalyptic number.

It is an amenable number.

82981771669 is a deficient number, since it is larger than the sum of its proper divisors (1375275).

82981771669 is a wasteful number, since it uses less digits than its factorization.

82981771669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1375274.

The product of its digits is 18289152, while the sum is 64.

The spelling of 82981771669 in words is "eighty-two billion, nine hundred eighty-one million, seven hundred seventy-one thousand, six hundred sixty-nine".