140643531613 has 8 divisors (see below), whose sum is σ = 151465324248. Its totient is φ = 129822176064.

The previous prime is 140643531593. The next prime is 140643531653. The reversal of 140643531613 is 316135346041.

It can be written as a sum of positive squares in 4 ways, for example, as 840826009 + 139802705604 = 28997^2 + 373902^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140643531613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140643531653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 913995 + ... + 1056727.

It is an arithmetic number, because the mean of its divisors is an integer number (18933165531).

Almost surely, 2^140643531613 is an apocalyptic number.

140643531613 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

140643531613 is a deficient number, since it is larger than the sum of its proper divisors (10821792635).

140643531613 is a wasteful number, since it uses less digits than its factorization.

140643531613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218543.

The product of its (nonzero) digits is 77760, while the sum is 37.

Adding to 140643531613 its reverse (316135346041), we get a palindrome (456778877654).

The spelling of 140643531613 in words is "one hundred forty billion, six hundred forty-three million, five hundred thirty-one thousand, six hundred thirteen".