40845205253 has 4 divisors (see below), whose sum is σ = 40850018508. Its totient is φ = 40840392000.

The previous prime is 40845205231. The next prime is 40845205301. The reversal of 40845205253 is 35250254804.

It is a happy number.

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 1982208484 + 38862996769 = 44522^2 + 197137^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40845205253 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 (40845205223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2393876 + ... + 2410877.

It is an arithmetic number, because the mean of its divisors is an integer number (10212504627).

Almost surely, 2^40845205253 is an apocalyptic number.

It is an amenable number.

40845205253 is a deficient number, since it is larger than the sum of its proper divisors (4813255).

40845205253 is an equidigital number, since it uses as much as digits as its factorization.

40845205253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4813254.

The product of its (nonzero) digits is 192000, while the sum is 38.

The spelling of 40845205253 in words is "forty billion, eight hundred forty-five million, two hundred five thousand, two hundred fifty-three".