181347758805157 has 6 divisors (see below), whose sum is σ = 210955556161158. Its totient is φ = 155440936118664.

The previous prime is 181347758805113. The next prime is 181347758805173. The reversal of 181347758805157 is 751508857743181.

181347758805157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 179597763185281 + 1749995619876 = 13401409^2 + 1322874^2 .

It is not a de Polignac number, because 181347758805157 - 2⁷ = 181347758805029 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 (181347758805197) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1850487334698 + ... + 1850487334795.

It is an arithmetic number, because the mean of its divisors is an integer number (35159259360193).

Almost surely, 2^{181347758805157} is an apocalyptic number.

It is an amenable number.

181347758805157 is a deficient number, since it is larger than the sum of its proper divisors (29607797356001).

181347758805157 is an equidigital number, since it uses as much as digits as its factorization.

181347758805157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3700974669507 (or 3700974669500 counting only the distinct ones).

The product of its (nonzero) digits is 263424000, while the sum is 70.

The spelling of 181347758805157 in words is "one hundred eighty-one trillion, three hundred forty-seven billion, seven hundred fifty-eight million, eight hundred five thousand, one hundred fifty-seven".