82517720461 has 16 divisors (see below), whose sum is σ = 94943476800. Its totient is φ = 70928179200.

The previous prime is 82517720459. The next prime is 82517720479. The reversal of 82517720461 is 16402771528.

It is a cyclic number.

It is not a de Polignac number, because 82517720461 - 2¹ = 82517720459 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 (82517720431) 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, 281460 + ... + 494221.

It is an arithmetic number, because the mean of its divisors is an integer number (5933967300).

Almost surely, 2^82517720461 is an apocalyptic number.

It is an amenable number.

82517720461 is a deficient number, since it is larger than the sum of its proper divisors (12425756339).

82517720461 is a wasteful number, since it uses less digits than its factorization.

82517720461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 776220.

The product of its (nonzero) digits is 188160, while the sum is 43.

The spelling of 82517720461 in words is "eighty-two billion, five hundred seventeen million, seven hundred twenty thousand, four hundred sixty-one".