144571643866 has 48 divisors (see below), whose sum is σ = 236571667416. Its totient is φ = 66229532928.

The previous prime is 144571643851. The next prime is 144571643869. The reversal of 144571643866 is 668346175441.

It can be written as a sum of positive squares in 12 ways, for example, as 88979907025 + 55591736841 = 298295^2 + 235779^2 .

It is a super-3 number, since 3×144571643866³ (a number of 34 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (144571643869) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42859756 + ... + 42863128.

Almost surely, 2^144571643866 is an apocalyptic number.

144571643866 is a deficient number, since it is larger than the sum of its proper divisors (92000023550).

144571643866 is a wasteful number, since it uses less digits than its factorization.

144571643866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4307 (or 4294 counting only the distinct ones).

The product of its digits is 11612160, while the sum is 55.

The spelling of 144571643866 in words is "one hundred forty-four billion, five hundred seventy-one million, six hundred forty-three thousand, eight hundred sixty-six".