140436063505 has 4 divisors (see below), whose sum is σ = 168523276212. Its totient is φ = 112348850800.

The previous prime is 140436063457. The next prime is 140436063529. The reversal of 140436063505 is 505360634041.

It is a Cunningham number, because it is equal to 374748²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 505360634041 = 4397 ⋅114933053.

It can be written as a sum of positive squares in 2 ways, for example, as 50556623104 + 89879440401 = 224848^2 + 299799^2 .

It is not a de Polignac number, because 140436063505 - 2¹⁷ = 140435932433 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 14043606346 + ... + 14043606355.

It is an arithmetic number, because the mean of its divisors is an integer number (42130819053).

Almost surely, 2^140436063505 is an apocalyptic number.

It is an amenable number.

140436063505 is a deficient number, since it is larger than the sum of its proper divisors (28087212707).

140436063505 is an equidigital number, since it uses as much as digits as its factorization.

140436063505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28087212706.

The product of its (nonzero) digits is 129600, while the sum is 37.

Adding to 140436063505 its reverse (505360634041), we get a palindrome (645796697546).

The spelling of 140436063505 in words is "one hundred forty billion, four hundred thirty-six million, sixty-three thousand, five hundred five".