142643406536 has 8 divisors (see below), whose sum is σ = 267456387270. Its totient is φ = 71321703264.

The previous prime is 142643406533. The next prime is 142643406571. The reversal of 142643406536 is 635604346241.

It can be written as a sum of positive squares in only one way, i.e., 135755402500 + 6888004036 = 368450^2 + 82994^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (142643406533) 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 as a sum of consecutive naturals, namely, 8915212901 + ... + 8915212916.

Almost surely, 2^142643406536 is an apocalyptic number.

It is an amenable number.

142643406536 is a deficient number, since it is larger than the sum of its proper divisors (124812980734).

142643406536 is a wasteful number, since it uses less digits than its factorization.

142643406536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17830425823 (or 17830425819 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 44.

The spelling of 142643406536 in words is "one hundred forty-two billion, six hundred forty-three million, four hundred six thousand, five hundred thirty-six".