181493946100105 has 8 divisors (see below), whose sum is σ = 221363108030664. Its totient is φ = 142814908406400.

The previous prime is 181493946100099. The next prime is 181493946100139. The reversal of 181493946100105 is 501001649394181.

It can be written as a sum of positive squares in 4 ways, for example, as 13922241487504 + 167571704612601 = 3731252^2 + 12944949^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 181493946100105 - 2³ = 181493946100097 is a prime.

It is a super-2 number, since 2×181493946100105² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 297531058876 + ... + 297531059485.

It is an arithmetic number, because the mean of its divisors is an integer number (27670388503833).

Almost surely, 2^{181493946100105} is an apocalyptic number.

It is an amenable number.

181493946100105 is a deficient number, since it is larger than the sum of its proper divisors (39869161930559).

181493946100105 is an equidigital number, since it uses as much as digits as its factorization.

181493946100105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 595062118427.

The product of its (nonzero) digits is 933120, while the sum is 52.

The spelling of 181493946100105 in words is "one hundred eighty-one trillion, four hundred ninety-three billion, nine hundred forty-six million, one hundred thousand, one hundred five".