178138138145 has 16 divisors (see below), whose sum is σ = 233536547520. Its totient is φ = 129367492800.

The previous prime is 178138138141. The next prime is 178138138163. The reversal of 178138138145 is 541831831871.

It is not a de Polignac number, because 178138138145 - 2² = 178138138141 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 178138138093 and 178138138102.

It is not an unprimeable number, because it can be changed into a prime (178138138141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2305610 + ... + 2381619.

It is an arithmetic number, because the mean of its divisors is an integer number (14596034220).

Almost surely, 2^178138138145 is an apocalyptic number.

It is an amenable number.

178138138145 is a deficient number, since it is larger than the sum of its proper divisors (55398409375).

178138138145 is a wasteful number, since it uses less digits than its factorization.

178138138145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4687936.

The product of its digits is 645120, while the sum is 50.

The spelling of 178138138145 in words is "one hundred seventy-eight billion, one hundred thirty-eight million, one hundred thirty-eight thousand, one hundred forty-five".