143921958644 has 6 divisors (see below), whose sum is σ = 251863427634. Its totient is φ = 71960979320.

The previous prime is 143921958623. The next prime is 143921958659. The reversal of 143921958644 is 446859129341.

It can be written as a sum of positive squares in only one way, i.e., 140460048400 + 3461910244 = 374780^2 + 58838^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 143921958644.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17990244827 + ... + 17990244834.

It is an arithmetic number, because the mean of its divisors is an integer number (41977237939).

Almost surely, 2^143921958644 is an apocalyptic number.

It is an amenable number.

143921958644 is a deficient number, since it is larger than the sum of its proper divisors (107941468990).

143921958644 is a wasteful number, since it uses less digits than its factorization.

143921958644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35980489665 (or 35980489663 counting only the distinct ones).

The product of its digits is 7464960, while the sum is 56.

The spelling of 143921958644 in words is "one hundred forty-three billion, nine hundred twenty-one million, nine hundred fifty-eight thousand, six hundred forty-four".