634048720447 has 4 divisors (see below), whose sum is σ = 634832465040. Its totient is φ = 633264975856.

The previous prime is 634048720441. The next prime is 634048720471. The reversal of 634048720447 is 744027840436.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 634048720447 - 2³ = 634048720439 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 634048720447.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634048720441) 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, 391871083 + ... + 391872700.

It is an arithmetic number, because the mean of its divisors is an integer number (158708116260).

Almost surely, 2^634048720447 is an apocalyptic number.

634048720447 is a deficient number, since it is larger than the sum of its proper divisors (783744593).

634048720447 is an equidigital number, since it uses as much as digits as its factorization.

634048720447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 783744592.

The product of its (nonzero) digits is 3612672, while the sum is 49.

The spelling of 634048720447 in words is "six hundred thirty-four billion, forty-eight million, seven hundred twenty thousand, four hundred forty-seven".