445513530253 has 4 divisors (see below), whose sum is σ = 486014760288. Its totient is φ = 405012300220.

The previous prime is 445513530227. The next prime is 445513530263. The reversal of 445513530253 is 352035315544.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-445513530253 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 (445513530263) 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, 20250615001 + ... + 20250615022.

It is an arithmetic number, because the mean of its divisors is an integer number (121503690072).

Almost surely, 2^445513530253 is an apocalyptic number.

It is an amenable number.

445513530253 is a deficient number, since it is larger than the sum of its proper divisors (40501230035).

445513530253 is a wasteful number, since it uses less digits than its factorization.

445513530253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40501230034.

The product of its (nonzero) digits is 540000, while the sum is 40.

Adding to 445513530253 its reverse (352035315544), we get a palindrome (797548845797).

The spelling of 445513530253 in words is "four hundred forty-five billion, five hundred thirteen million, five hundred thirty thousand, two hundred fifty-three".