140015403805 has 4 divisors (see below), whose sum is σ = 168018484572. Its totient is φ = 112012323040.

The previous prime is 140015403779. The next prime is 140015403823. The reversal of 140015403805 is 508304510041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 508304510041 = 570391 ⋅891151.

It can be written as a sum of positive squares in 2 ways, for example, as 87458007289 + 52557396516 = 295733^2 + 229254^2 .

It is not a de Polignac number, because 140015403805 - 2¹⁹ = 140014879517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14001540376 + ... + 14001540385.

It is an arithmetic number, because the mean of its divisors is an integer number (42004621143).

Almost surely, 2^140015403805 is an apocalyptic number.

It is an amenable number.

140015403805 is a deficient number, since it is larger than the sum of its proper divisors (28003080767).

140015403805 is an equidigital number, since it uses as much as digits as its factorization.

140015403805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28003080766.

The product of its (nonzero) digits is 9600, while the sum is 31.

Adding to 140015403805 its reverse (508304510041), we get a palindrome (648319913846).

The spelling of 140015403805 in words is "one hundred forty billion, fifteen million, four hundred three thousand, eight hundred five".