142781444833 has 4 divisors (see below), whose sum is σ = 144385730820. Its totient is φ = 141177158848.

The previous prime is 142781444809. The next prime is 142781444863. The reversal of 142781444833 is 338444187241.

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 71015321169 + 71766123664 = 266487^2 + 267892^2 .

It is a cyclic number.

It is not a de Polignac number, because 142781444833 - 2²¹ = 142779347681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142781444863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 802142860 + ... + 802143037.

It is an arithmetic number, because the mean of its divisors is an integer number (36096432705).

Almost surely, 2^142781444833 is an apocalyptic number.

It is an amenable number.

142781444833 is a deficient number, since it is larger than the sum of its proper divisors (1604285987).

142781444833 is an equidigital number, since it uses as much as digits as its factorization.

142781444833 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1604285986.

The product of its digits is 2064384, while the sum is 49.

The spelling of 142781444833 in words is "one hundred forty-two billion, seven hundred eighty-one million, four hundred forty-four thousand, eight hundred thirty-three".