634453343354437 has 4 divisors (see below), whose sum is σ = 635197133910220. Its totient is φ = 633709552798656.

The previous prime is 634453343354387. The next prime is 634453343354497. The reversal of 634453343354437 is 734453343354436.

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 121182977122596 + 513270366231841 = 11008314^2 + 22655471^2 .

It is a cyclic number.

It is not a de Polignac number, because 634453343354437 - 2⁷ = 634453343354309 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 (634453343354497) 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, 371895276612 + ... + 371895278317.

It is an arithmetic number, because the mean of its divisors is an integer number (158799283477555).

Almost surely, 2^{634453343354437} is an apocalyptic number.

It is an amenable number.

634453343354437 is a deficient number, since it is larger than the sum of its proper divisors (743790555783).

634453343354437 is an equidigital number, since it uses as much as digits as its factorization.

634453343354437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 743790555782.

The product of its digits is 783820800, while the sum is 61.

Subtracting 634453343354437 from its reverse (734453343354436), we obtain a palindrome (99999999999999).

The spelling of 634453343354437 in words is "six hundred thirty-four trillion, four hundred fifty-three billion, three hundred forty-three million, three hundred fifty-four thousand, four hundred thirty-seven".