142440443636 has 6 divisors (see below), whose sum is σ = 249270776370. Its totient is φ = 71220221816.

The previous prime is 142440443611. The next prime is 142440443671. The reversal of 142440443636 is 636344044241.

It can be written as a sum of positive squares in only one way, i.e., 101780140900 + 40660302736 = 319030^2 + 201644^2 .

It is a super-3 number, since 3×142440443636³ (a number of 34 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 142440443593 and 142440443602.

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, 17805055451 + ... + 17805055458.

It is an arithmetic number, because the mean of its divisors is an integer number (41545129395).

Almost surely, 2^142440443636 is an apocalyptic number.

It is an amenable number.

142440443636 is a deficient number, since it is larger than the sum of its proper divisors (106830332734).

142440443636 is a wasteful number, since it uses less digits than its factorization.

142440443636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35610110913 (or 35610110911 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 41.

Adding to 142440443636 its reverse (636344044241), we get a palindrome (778784487877).

The spelling of 142440443636 in words is "one hundred forty-two billion, four hundred forty million, four hundred forty-three thousand, six hundred thirty-six".