168856153 has 4 divisors (see below), whose sum is σ = 169466020. Its totient is φ = 168246288.

The previous prime is 168856139. The next prime is 168856159. The reversal of 168856153 is 351658861.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 73051209 + 95804944 = 8547^2 + 9788^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168856153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168856159) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 304518 + ... + 305071.

It is an arithmetic number, because the mean of its divisors is an integer number (42366505).

Almost surely, 2^168856153 is an apocalyptic number.

It is an amenable number.

168856153 is a deficient number, since it is larger than the sum of its proper divisors (609867).

168856153 is an equidigital number, since it uses as much as digits as its factorization.

168856153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609866.

The product of its digits is 172800, while the sum is 43.

The square root of 168856153 is about 12994.4662452907. The cubic root of 168856153 is about 552.7205733954.

The spelling of 168856153 in words is "one hundred sixty-eight million, eight hundred fifty-six thousand, one hundred fifty-three".