82117537769 has 4 divisors (see below), whose sum is σ = 83274122880. Its totient is φ = 80960952660.

The previous prime is 82117537759. The next prime is 82117537807. The reversal of 82117537769 is 96773571128.

It is a happy number.

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 82117537769 - 2²⁰ = 82116489193 is a prime.

It is a super-2 number, since 2×82117537769² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (82117537759) 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, 578292449 + ... + 578292590.

It is an arithmetic number, because the mean of its divisors is an integer number (20818530720).

Almost surely, 2^82117537769 is an apocalyptic number.

It is an amenable number.

82117537769 is a deficient number, since it is larger than the sum of its proper divisors (1156585111).

82117537769 is a wasteful number, since it uses less digits than its factorization.

82117537769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1156585110.

The product of its digits is 4445280, while the sum is 56.

The spelling of 82117537769 in words is "eighty-two billion, one hundred seventeen million, five hundred thirty-seven thousand, seven hundred sixty-nine".