42645213253 has 4 divisors (see below), whose sum is σ = 42880822348. Its totient is φ = 42409604160.

The previous prime is 42645213241. The next prime is 42645213257. The reversal of 42645213253 is 35231254624.

42645213253 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 6407522209 + 36237691044 = 80047^2 + 190362^2 .

It is a cyclic number.

It is not a de Polignac number, because 42645213253 - 2⁹ = 42645212741 is a prime.

It is a super-2 number, since 2×42645213253² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42645213257) 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, 117804276 + ... + 117804637.

It is an arithmetic number, because the mean of its divisors is an integer number (10720205587).

Almost surely, 2^42645213253 is an apocalyptic number.

It is an amenable number.

42645213253 is a deficient number, since it is larger than the sum of its proper divisors (235609095).

42645213253 is a wasteful number, since it uses less digits than its factorization.

42645213253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235609094.

The product of its digits is 172800, while the sum is 37.

Adding to 42645213253 its reverse (35231254624), we get a palindrome (77876467877).

The spelling of 42645213253 in words is "forty-two billion, six hundred forty-five million, two hundred thirteen thousand, two hundred fifty-three".