178020323216197 has 16 divisors (see below), whose sum is σ = 221949316104192. Its totient is φ = 138715947382320.

The previous prime is 178020323216123. The next prime is 178020323216261. The reversal of 178020323216197 is 791612323020871.

It is not a de Polignac number, because 178020323216197 - 2³⁹ = 177470567402309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (178020323216107) 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, 790113 + ... + 18885574.

It is an arithmetic number, because the mean of its divisors is an integer number (13871832256512).

Almost surely, 2^{178020323216197} is an apocalyptic number.

It is an amenable number.

178020323216197 is a deficient number, since it is larger than the sum of its proper divisors (43928992887995).

178020323216197 is a wasteful number, since it uses less digits than its factorization.

178020323216197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19793208.

The product of its (nonzero) digits is 1524096, while the sum is 52.

The spelling of 178020323216197 in words is "one hundred seventy-eight trillion, twenty billion, three hundred twenty-three million, two hundred sixteen thousand, one hundred ninety-seven".