181382084401 has 4 divisors (see below), whose sum is σ = 207293810752. Its totient is φ = 155470358052.

The previous prime is 181382084399. The next prime is 181382084419. The reversal of 181382084401 is 104480283181.

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, and also an emirpimes, since its reverse is a distinct semiprime: 104480283181 = 37243 ⋅2805367.

It is a cyclic number.

It is not a de Polignac number, because 181382084401 - 2¹ = 181382084399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (181382084441) 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, 12955863165 + ... + 12955863178.

It is an arithmetic number, because the mean of its divisors is an integer number (51823452688).

Almost surely, 2^181382084401 is an apocalyptic number.

It is an amenable number.

181382084401 is a deficient number, since it is larger than the sum of its proper divisors (25911726351).

181382084401 is an equidigital number, since it uses as much as digits as its factorization.

181382084401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25911726350.

The product of its (nonzero) digits is 49152, while the sum is 40.

The spelling of 181382084401 in words is "one hundred eighty-one billion, three hundred eighty-two million, eighty-four thousand, four hundred one".