140943339781 has 4 divisors (see below), whose sum is σ = 149234124492. Its totient is φ = 132652555072.

The previous prime is 140943339773. The next prime is 140943339821. The reversal of 140943339781 is 187933349041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 187933349041 = 25943 ⋅7244087.

It can be written as a sum of positive squares in 2 ways, for example, as 54830437281 + 86112902500 = 234159^2 + 293450^2 .

It is a cyclic number.

It is not a de Polignac number, because 140943339781 - 2³ = 140943339773 is a prime.

It is a super-2 number, since 2×140943339781² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140943339721) 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, 4145392330 + ... + 4145392363.

It is an arithmetic number, because the mean of its divisors is an integer number (37308531123).

Almost surely, 2^140943339781 is an apocalyptic number.

It is an amenable number.

140943339781 is a deficient number, since it is larger than the sum of its proper divisors (8290784711).

140943339781 is an equidigital number, since it uses as much as digits as its factorization.

140943339781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8290784710.

The product of its (nonzero) digits is 1959552, while the sum is 52.

The spelling of 140943339781 in words is "one hundred forty billion, nine hundred forty-three million, three hundred thirty-nine thousand, seven hundred eighty-one".