168720572 has 6 divisors (see below), whose sum is σ = 295261008. Its totient is φ = 84360284.

The previous prime is 168720557. The next prime is 168720577. The reversal of 168720572 is 275027861.

168720572 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168720577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21090068 + ... + 21090075.

It is an arithmetic number, because the mean of its divisors is an integer number (49210168).

Almost surely, 2^168720572 is an apocalyptic number.

It is an amenable number.

168720572 is a deficient number, since it is larger than the sum of its proper divisors (126540436).

168720572 is a wasteful number, since it uses less digits than its factorization.

168720572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42180147 (or 42180145 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 38.

The square root of 168720572 is about 12989.2483231325. The cubic root of 168720572 is about 552.5726003571.

The spelling of 168720572 in words is "one hundred sixty-eight million, seven hundred twenty thousand, five hundred seventy-two".