142489967665 has 16 divisors (see below), whose sum is σ = 175482303696. Its totient is φ = 111006028800.

The previous prime is 142489967647. The next prime is 142489967671. The reversal of 142489967665 is 566769984241.

It can be written as a sum of positive squares in 8 ways, for example, as 32340986896 + 110148980769 = 179836^2 + 331887^2 .

It is not a de Polignac number, because 142489967665 - 2⁹ = 142489967153 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 142489967665.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 531492 + ... + 753301.

It is an arithmetic number, because the mean of its divisors is an integer number (10967643981).

Almost surely, 2^142489967665 is an apocalyptic number.

It is an amenable number.

142489967665 is a deficient number, since it is larger than the sum of its proper divisors (32992336031).

142489967665 is a wasteful number, since it uses less digits than its factorization.

142489967665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1285380.

The product of its digits is 156764160, while the sum is 67.

The spelling of 142489967665 in words is "one hundred forty-two billion, four hundred eighty-nine million, nine hundred sixty-seven thousand, six hundred sixty-five".