143402911681 has 8 divisors (see below), whose sum is σ = 157074183720. Its totient is φ = 130313395968.

The previous prime is 143402911667. The next prime is 143402911693. The reversal of 143402911681 is 186119204341.

It is a happy number.

143402911681 is digitally balanced in base 2, 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 4 ways, for example, as 16456784656 + 126946127025 = 128284^2 + 356295^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 143402911681 - 2¹¹ = 143402909633 is a prime.

It is a super-2 number, since 2×143402911681² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (143402911621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145438566 + ... + 145439551.

It is an arithmetic number, because the mean of its divisors is an integer number (19634272965).

Almost surely, 2^143402911681 is an apocalyptic number.

It is an amenable number.

143402911681 is a deficient number, since it is larger than the sum of its proper divisors (13671272039).

143402911681 is a wasteful number, since it uses less digits than its factorization.

143402911681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290878163.

The product of its (nonzero) digits is 41472, while the sum is 40.

The spelling of 143402911681 in words is "one hundred forty-three billion, four hundred two million, nine hundred eleven thousand, six hundred eighty-one".