178243481349 has 12 divisors (see below), whose sum is σ = 257549737536. Its totient is φ = 118788865512.

The previous prime is 178243481341. The next prime is 178243481371. The reversal of 178243481349 is 943184342871.

178243481349 is a `hidden beast` number, since 1 + 7 + 82 + 43 + 481 + 3 + 49 = 666.

It is not a de Polignac number, because 178243481349 - 2³ = 178243481341 is a prime.

It is a super-2 number, since 2×178243481349² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 178243481295 and 178243481304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (178243481341) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3315357 + ... + 3368690.

It is an arithmetic number, because the mean of its divisors is an integer number (21462478128).

Almost surely, 2^178243481349 is an apocalyptic number.

It is an amenable number.

178243481349 is a deficient number, since it is larger than the sum of its proper divisors (79306256187).

178243481349 is a wasteful number, since it uses less digits than its factorization.

178243481349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6687016 (or 6687013 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 54.

The spelling of 178243481349 in words is "one hundred seventy-eight billion, two hundred forty-three million, four hundred eighty-one thousand, three hundred forty-nine".