142864443649 has 4 divisors (see below), whose sum is σ = 142866199764. Its totient is φ = 142862687536.

The previous prime is 142864443647. The next prime is 142864443713. The reversal of 142864443649 is 946344468241.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 107604993024 + 35259450625 = 328032^2 + 187775^2 .

It is a cyclic number.

It is not a de Polignac number, because 142864443649 - 2¹ = 142864443647 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 142864443649.

It is not an unprimeable number, because it can be changed into a prime (142864443647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 749782 + ... + 920815.

It is an arithmetic number, because the mean of its divisors is an integer number (35716549941).

Almost surely, 2^142864443649 is an apocalyptic number.

It is an amenable number.

142864443649 is a deficient number, since it is larger than the sum of its proper divisors (1756115).

142864443649 is an equidigital number, since it uses as much as digits as its factorization.

142864443649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1756114.

The product of its digits is 15925248, while the sum is 55.

The spelling of 142864443649 in words is "one hundred forty-two billion, eight hundred sixty-four million, four hundred forty-three thousand, six hundred forty-nine".