647450316253 has 4 divisors (see below), whose sum is σ = 697254186748. Its totient is φ = 597646445760.

The previous prime is 647450316251. The next prime is 647450316307. The reversal of 647450316253 is 352613054746.

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 119855824804 + 527594491449 = 346202^2 + 726357^2 .

It is not a de Polignac number, because 647450316253 - 2¹ = 647450316251 is a prime.

It is a super-2 number, since 2×647450316253² (a number of 24 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 (647450316251) 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, 24901935228 + ... + 24901935253.

It is an arithmetic number, because the mean of its divisors is an integer number (174313546687).

Almost surely, 2^647450316253 is an apocalyptic number.

It is an amenable number.

647450316253 is a deficient number, since it is larger than the sum of its proper divisors (49803870495).

647450316253 is a wasteful number, since it uses less digits than its factorization.

647450316253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49803870494.

The product of its (nonzero) digits is 1814400, while the sum is 46.

The spelling of 647450316253 in words is "six hundred forty-seven billion, four hundred fifty million, three hundred sixteen thousand, two hundred fifty-three".