143661568 has 20 divisors (see below), whose sum is σ = 287043570. Its totient is φ = 71830528.

The previous prime is 143661541. The next prime is 143661587. The reversal of 143661568 is 865166341.

143661568 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 131606784 + 12054784 = 11472^2 + 3472^2 .

It is a super-2 number, since 2×143661568² = 41277292240437248, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 143661568.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139783 + ... + 140806.

Almost surely, 2^143661568 is an apocalyptic number.

It is an amenable number.

143661568 is a deficient number, since it is larger than the sum of its proper divisors (143382002).

143661568 is an frugal number, since it uses more digits than its factorization.

143661568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280607 (or 280591 counting only the distinct ones).

The product of its digits is 103680, while the sum is 40.

The square root of 143661568 is about 11985.8903715994. The cubic root of 143661568 is about 523.7373350928.

The spelling of 143661568 in words is "one hundred forty-three million, six hundred sixty-one thousand, five hundred sixty-eight".