168388383994 has 16 divisors (see below), whose sum is σ = 265906288800. Its totient is φ = 79753950864.

The previous prime is 168388383979. The next prime is 168388384007. The reversal of 168388383994 is 499383883861.

It is a super-2 number, since 2×168388383994² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99664 + ... + 588820.

It is an arithmetic number, because the mean of its divisors is an integer number (16619143050).

Almost surely, 2^168388383994 is an apocalyptic number.

168388383994 is a deficient number, since it is larger than the sum of its proper divisors (97517904806).

168388383994 is a wasteful number, since it uses less digits than its factorization.

168388383994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498237.

The product of its digits is 214990848, while the sum is 70.

The spelling of 168388383994 in words is "one hundred sixty-eight billion, three hundred eighty-eight million, three hundred eighty-three thousand, nine hundred ninety-four".