82420077865117 has 4 divisors (see below), whose sum is σ = 82420101913536. Its totient is φ = 82420053816700.

The previous prime is 82420077865063. The next prime is 82420077865163. The reversal of 82420077865117 is 71156877002428.

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 82420077865117 - 2⁷ = 82420077864989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82420077865187) 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, 5814283 + ... + 14094184.

It is an arithmetic number, because the mean of its divisors is an integer number (20605025478384).

Almost surely, 2^{82420077865117} is an apocalyptic number.

It is an amenable number.

82420077865117 is a deficient number, since it is larger than the sum of its proper divisors (24048419).

82420077865117 is a wasteful number, since it uses less digits than its factorization.

82420077865117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24048418.

The product of its (nonzero) digits is 10536960, while the sum is 58.

The spelling of 82420077865117 in words is "eighty-two trillion, four hundred twenty billion, seventy-seven million, eight hundred sixty-five thousand, one hundred seventeen".