181370841474385 has 8 divisors (see below), whose sum is σ = 230447657402856. Its totient is φ = 136561574757120.

The previous prime is 181370841474373. The next prime is 181370841474461. The reversal of 181370841474385 is 583474148073181.

It can be written as a sum of positive squares in 4 ways, for example, as 5413481702721 + 175957359771664 = 2326689^2 + 13264892^2 .

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

It is not a de Polignac number, because 181370841474385 - 2¹⁵ = 181370841441617 is a prime.

It is a super-2 number, since 2×181370841474385² (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, 1066887302706 + ... + 1066887302875.

It is an arithmetic number, because the mean of its divisors is an integer number (28805957175357).

Almost surely, 2^{181370841474385} is an apocalyptic number.

It is an amenable number.

181370841474385 is a deficient number, since it is larger than the sum of its proper divisors (49076815928471).

181370841474385 is a wasteful number, since it uses less digits than its factorization.

181370841474385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2133774605603.

The product of its (nonzero) digits is 72253440, while the sum is 64.

The spelling of 181370841474385 in words is "one hundred eighty-one trillion, three hundred seventy billion, eight hundred forty-one million, four hundred seventy-four thousand, three hundred eighty-five".