168578845544 has 8 divisors (see below), whose sum is σ = 316085335410. Its totient is φ = 84289422768.

The previous prime is 168578845499. The next prime is 168578845579. The reversal of 168578845544 is 445548875861.

It can be written as a sum of positive squares in only one way, i.e., 165494376100 + 3084469444 = 406810^2 + 55538^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10536177839 + ... + 10536177854.

Almost surely, 2^168578845544 is an apocalyptic number.

It is an amenable number.

168578845544 is a deficient number, since it is larger than the sum of its proper divisors (147506489866).

168578845544 is a wasteful number, since it uses less digits than its factorization.

168578845544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21072355699 (or 21072355695 counting only the distinct ones).

The product of its digits is 172032000, while the sum is 65.

The spelling of 168578845544 in words is "one hundred sixty-eight billion, five hundred seventy-eight million, eight hundred forty-five thousand, five hundred forty-four".