143666311433540 has 72 divisors (see below), whose sum is σ = 350965746232920. Its totient is φ = 49255691778048.

The previous prime is 143666311433497. The next prime is 143666311433609. The reversal of 143666311433540 is 45334113666341.

It can be written as a sum of positive squares in 4 ways, for example, as 13091993577796 + 130574317855744 = 3618286^2 + 11426912^2 .

It is a super-2 number, since 2×143666311433540² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34701422 + ... + 38620218.

It is an arithmetic number, because the mean of its divisors is an integer number (4874524253235).

Almost surely, 2^{143666311433540} is an apocalyptic number.

143666311433540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

143666311433540 is an abundant number, since it is smaller than the sum of its proper divisors (207299434799380).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

143666311433540 is a wasteful number, since it uses less digits than its factorization.

143666311433540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3956229 (or 3956220 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 50.

The spelling of 143666311433540 in words is "one hundred forty-three trillion, six hundred sixty-six billion, three hundred eleven million, four hundred thirty-three thousand, five hundred forty".