142985896769 has 4 divisors (see below), whose sum is σ = 142997915220. Its totient is φ = 142973878320.

The previous prime is 142985896763. The next prime is 142985896771. The reversal of 142985896769 is 967698589241.

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 31893673744 + 111092223025 = 178588^2 + 333305^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142985896769 is a prime.

It is a super-2 number, since 2×142985896769² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 142985896696 and 142985896705.

It is not an unprimeable number, because it can be changed into a prime (142985896763) 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 in 3 ways as a sum of consecutive naturals, for example, 5991362 + ... + 6015179.

It is an arithmetic number, because the mean of its divisors is an integer number (35749478805).

Almost surely, 2^142985896769 is an apocalyptic number.

It is an amenable number.

142985896769 is a deficient number, since it is larger than the sum of its proper divisors (12018451).

142985896769 is a wasteful number, since it uses less digits than its factorization.

142985896769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12018450.

The product of its digits is 470292480, while the sum is 74.

The spelling of 142985896769 in words is "one hundred forty-two billion, nine hundred eighty-five million, eight hundred ninety-six thousand, seven hundred sixty-nine".