168698144 has 12 divisors (see below), whose sum is σ = 332124534. Its totient is φ = 84349056.

The previous prime is 168698137. The next prime is 168698147. The reversal of 168698144 is 441896861.

It can be written as a sum of positive squares in only one way, i.e., 168688144 + 10000 = 12988^2 + 100^2 .

It is not an unprimeable number, because it can be changed into a prime (168698147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2635877 + ... + 2635940.

Almost surely, 2^168698144 is an apocalyptic number.

It is an amenable number.

168698144 is a deficient number, since it is larger than the sum of its proper divisors (163426390).

168698144 is an equidigital number, since it uses as much as digits as its factorization.

168698144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5271827 (or 5271819 counting only the distinct ones).

The product of its digits is 331776, while the sum is 47.

The square root of 168698144 is about 12988.3849650370. The cubic root of 168698144 is about 552.5481148082.

The spelling of 168698144 in words is "one hundred sixty-eight million, six hundred ninety-eight thousand, one hundred forty-four".