671206266320453 has 4 divisors (see below), whose sum is σ = 674137298051340. Its totient is φ = 668275234589568.

The previous prime is 671206266320449. The next prime is 671206266320503. The reversal of 671206266320453 is 354023662602176.

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 269926564431364 + 401279701889089 = 16429442^2 + 20031967^2 .

It is a cyclic number.

It is not a de Polignac number, because 671206266320453 - 2² = 671206266320449 is a prime.

It is a super-2 number, since 2×671206266320453² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 671206266320395 and 671206266320404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671206266320153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1465515865100 + ... + 1465515865557.

It is an arithmetic number, because the mean of its divisors is an integer number (168534324512835).

Almost surely, 2^{671206266320453} is an apocalyptic number.

It is an amenable number.

671206266320453 is a deficient number, since it is larger than the sum of its proper divisors (2931031730887).

671206266320453 is a wasteful number, since it uses less digits than its factorization.

671206266320453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2931031730886.

The product of its (nonzero) digits is 13063680, while the sum is 53.

The spelling of 671206266320453 in words is "six hundred seventy-one trillion, two hundred six billion, two hundred sixty-six million, three hundred twenty thousand, four hundred fifty-three".