168142564 has 6 divisors (see below), whose sum is σ = 294249494. Its totient is φ = 84071280.

The previous prime is 168142549. The next prime is 168142589. The reversal of 168142564 is 465241861.

It can be written as a sum of positive squares in only one way, i.e., 158961664 + 9180900 = 12608^2 + 3030^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21017817 + ... + 21017824.

Almost surely, 2^168142564 is an apocalyptic number.

It is an amenable number.

168142564 is a deficient number, since it is larger than the sum of its proper divisors (126106930).

168142564 is a wasteful number, since it uses less digits than its factorization.

168142564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42035645 (or 42035643 counting only the distinct ones).

The product of its digits is 46080, while the sum is 37.

The square root of 168142564 is about 12966.9797562887. The cubic root of 168142564 is about 551.9408718085.

The spelling of 168142564 in words is "one hundred sixty-eight million, one hundred forty-two thousand, five hundred sixty-four".