40253518205 has 4 divisors (see below), whose sum is σ = 48304221852. Its totient is φ = 32202814560.

The previous prime is 40253518189. The next prime is 40253518211. The reversal of 40253518205 is 50281535204.

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 13384407481 + 26869110724 = 115691^2 + 163918^2 .

It is not a de Polignac number, because 40253518205 - 2⁴ = 40253518189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4025351816 + ... + 4025351825.

It is an arithmetic number, because the mean of its divisors is an integer number (12076055463).

Almost surely, 2^40253518205 is an apocalyptic number.

It is an amenable number.

40253518205 is a deficient number, since it is larger than the sum of its proper divisors (8050703647).

40253518205 is an equidigital number, since it uses as much as digits as its factorization.

40253518205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8050703646.

The product of its (nonzero) digits is 48000, while the sum is 35.

The spelling of 40253518205 in words is "forty billion, two hundred fifty-three million, five hundred eighteen thousand, two hundred five".