143665623431652 has 48 divisors (see below), whose sum is σ = 383163083945600. Its totient is φ = 41041454395392.

The previous prime is 143665623431651. The next prime is 143665623431653. The reversal of 143665623431652 is 256134326566341.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (143665623431651) and next prime (143665623431653).

It is a super-2 number, since 2×143665623431652² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 143665623431592 and 143665623431601.

It is not an unprimeable number, because it can be changed into a prime (143665623431651) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 121629277 + ... + 122804772.

Almost surely, 2^{143665623431652} is an apocalyptic number.

143665623431652 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

143665623431652 is an abundant number, since it is smaller than the sum of its proper divisors (239497460513948).

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

143665623431652 is a wasteful number, since it uses less digits than its factorization.

143665623431652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244441060 (or 244441058 counting only the distinct ones).

The product of its digits is 55987200, while the sum is 57.

Adding to 143665623431652 its reverse (256134326566341), we get a palindrome (399799949997993).

The spelling of 143665623431652 in words is "one hundred forty-three trillion, six hundred sixty-five billion, six hundred twenty-three million, four hundred thirty-one thousand, six hundred fifty-two".