168223640446 has 8 divisors (see below), whose sum is σ = 253745156520. Its totient is φ = 83641921608.

The previous prime is 168223640419. The next prime is 168223640483. The reversal of 168223640446 is 644046322861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 168223640396 and 168223640405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234948861 + ... + 234949576.

It is an arithmetic number, because the mean of its divisors is an integer number (31718144565).

Almost surely, 2^168223640446 is an apocalyptic number.

168223640446 is a deficient number, since it is larger than the sum of its proper divisors (85521516074).

168223640446 is a wasteful number, since it uses less digits than its factorization.

168223640446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469898618.

The product of its (nonzero) digits is 1327104, while the sum is 46.

The spelling of 168223640446 in words is "one hundred sixty-eight billion, two hundred twenty-three million, six hundred forty thousand, four hundred forty-six".