168986487638 has 8 divisors (see below), whose sum is σ = 253484938200. Its totient is φ = 84491508240.

The previous prime is 168986487613. The next prime is 168986487643. The reversal of 168986487638 is 836784689861.

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

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, 742463 + ... + 942986.

It is an arithmetic number, because the mean of its divisors is an integer number (31685617275).

Almost surely, 2^168986487638 is an apocalyptic number.

168986487638 is a deficient number, since it is larger than the sum of its proper divisors (84498450562).

168986487638 is a wasteful number, since it uses less digits than its factorization.

168986487638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1735582.

The product of its digits is 668860416, while the sum is 74.

The spelling of 168986487638 in words is "one hundred sixty-eight billion, nine hundred eighty-six million, four hundred eighty-seven thousand, six hundred thirty-eight".