28631318453 has 4 divisors (see below), whose sum is σ = 28733209548. Its totient is φ = 28529427360.

The previous prime is 28631318449. The next prime is 28631318467. The reversal of 28631318453 is 35481313682.

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 22807644484 + 5823673969 = 151022^2 + 76313^2 .

It is a cyclic number.

It is not a de Polignac number, because 28631318453 - 2² = 28631318449 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 (28633318453) 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, 50945126 + ... + 50945687.

It is an arithmetic number, because the mean of its divisors is an integer number (7183302387).

Almost surely, 2^28631318453 is an apocalyptic number.

It is an amenable number.

28631318453 is a deficient number, since it is larger than the sum of its proper divisors (101891095).

28631318453 is a wasteful number, since it uses less digits than its factorization.

28631318453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101891094.

The product of its digits is 414720, while the sum is 44.

The spelling of 28631318453 in words is "twenty-eight billion, six hundred thirty-one million, three hundred eighteen thousand, four hundred fifty-three".