63434243437 has 4 divisors (see below), whose sum is σ = 63437199516. Its totient is φ = 63431287360.

The previous prime is 63434243359. The next prime is 63434243441. The reversal of 63434243437 is 73434243436.

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 39720091401 + 23714152036 = 199299^2 + 153994^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63434243437 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 63434243393 and 63434243402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63434243837) 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, 1445614 + ... + 1488847.

It is an arithmetic number, because the mean of its divisors is an integer number (15859299879).

Almost surely, 2^63434243437 is an apocalyptic number.

It is an amenable number.

63434243437 is a deficient number, since it is larger than the sum of its proper divisors (2956079).

63434243437 is a wasteful number, since it uses less digits than its factorization.

63434243437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2956078.

The product of its digits is 1741824, while the sum is 43.

Subtracting 63434243437 from its reverse (73434243436), we obtain a palindrome (9999999999).

The spelling of 63434243437 in words is "sixty-three billion, four hundred thirty-four million, two hundred forty-three thousand, four hundred thirty-seven".