143918561956 has 27 divisors (see below), whose sum is σ = 272740109313. Its totient is φ = 66419399280.

The previous prime is 143918561939. The next prime is 143918561959. The reversal of 143918561956 is 659165819341.

It is a happy number.

The square root of 143918561956 is 379366.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 21289728100 + 122628833856 = 145910^2 + 350184^2 .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 143918561956.

It is not an unprimeable number, because it can be changed into a prime (143918561959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 9856221 + ... + 9870811.

Almost surely, 2^143918561956 is an apocalyptic number.

143918561956 is the 379366-th square number.

It is an amenable number.

143918561956 is a deficient number, since it is larger than the sum of its proper divisors (128821547357).

143918561956 is an frugal number, since it uses more digits than its factorization.

143918561956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29212 (or 14606 counting only the distinct ones).

The product of its digits is 6998400, while the sum is 58.

The spelling of 143918561956 in words is "one hundred forty-three billion, nine hundred eighteen million, five hundred sixty-one thousand, nine hundred fifty-six".