168537645 has 16 divisors (see below), whose sum is σ = 299622720. Its totient is φ = 89886672.

The previous prime is 168537631. The next prime is 168537671. The reversal of 168537645 is 546735861.

168537645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 168537645 - 2⁷ = 168537517 is a prime.

It is a super-3 number, since 3×168537645³ (a number of 26 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 168537645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 624079 + ... + 624348.

It is an arithmetic number, because the mean of its divisors is an integer number (18726420).

Almost surely, 2^168537645 is an apocalyptic number.

168537645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

168537645 is a deficient number, since it is larger than the sum of its proper divisors (131085075).

168537645 is a wasteful number, since it uses less digits than its factorization.

168537645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1248441 (or 1248435 counting only the distinct ones).

The product of its digits is 604800, while the sum is 45.

The square root of 168537645 is about 12982.2049359883. The cubic root of 168537645 is about 552.3728282341.

The spelling of 168537645 in words is "one hundred sixty-eight million, five hundred thirty-seven thousand, six hundred forty-five".