178945239668 has 36 divisors (see below), whose sum is σ = 339137678880. Its totient is φ = 82579944096.

The previous prime is 178945239667. The next prime is 178945239677. The reversal of 178945239668 is 866932549871.

It is a junction number, because it is equal to n+sod(n) for n = 178945239598 and 178945239607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (178945239667) 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, 10420073 + ... + 10437231.

It is an arithmetic number, because the mean of its divisors is an integer number (9420491080).

Almost surely, 2^178945239668 is an apocalyptic number.

It is an amenable number.

178945239668 is a deficient number, since it is larger than the sum of its proper divisors (160192439212).

178945239668 is a wasteful number, since it uses less digits than its factorization.

178945239668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32616 (or 32601 counting only the distinct ones).

The product of its digits is 156764160, while the sum is 68.

The spelling of 178945239668 in words is "one hundred seventy-eight billion, nine hundred forty-five million, two hundred thirty-nine thousand, six hundred sixty-eight".