167997449838778 has 32 divisors (see below), whose sum is σ = 297928428197760. Its totient is φ = 69515739034560.

The previous prime is 167997449838737. The next prime is 167997449838787. The reversal of 167997449838778 is 877838944799761.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 167997449838778.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66071500 + ... + 68567032.

It is an arithmetic number, because the mean of its divisors is an integer number (9310263381180).

Almost surely, 2^{167997449838778} is an apocalyptic number.

167997449838778 is a deficient number, since it is larger than the sum of its proper divisors (129930978358982).

167997449838778 is a wasteful number, since it uses less digits than its factorization.

167997449838778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2661382.

The product of its digits is 258096513024, while the sum is 97.

The spelling of 167997449838778 in words is "one hundred sixty-seven trillion, nine hundred ninety-seven billion, four hundred forty-nine million, eight hundred thirty-eight thousand, seven hundred seventy-eight".