181717138580086 has 16 divisors (see below), whose sum is σ = 279948137859936. Its totient is φ = 88401189450816.

The previous prime is 181717138580083. The next prime is 181717138580101. The reversal of 181717138580086 is 680085831717181.

181717138580086 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×181717138580086² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181717138580083) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20423106 + ... + 27938101.

It is an arithmetic number, because the mean of its divisors is an integer number (17496758616246).

Almost surely, 2^{181717138580086} is an apocalyptic number.

181717138580086 is a deficient number, since it is larger than the sum of its proper divisors (98230999279850).

181717138580086 is a wasteful number, since it uses less digits than its factorization.

181717138580086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48412023.

The product of its (nonzero) digits is 18063360, while the sum is 64.

The spelling of 181717138580086 in words is "one hundred eighty-one trillion, seven hundred seventeen billion, one hundred thirty-eight million, five hundred eighty thousand, eighty-six".