63078566605 has 4 divisors (see below), whose sum is σ = 75694279932. Its totient is φ = 50462853280.

The previous prime is 63078566591. The next prime is 63078566609. The reversal of 63078566605 is 50666587036.

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 10657258756 + 52421307849 = 103234^2 + 228957^2 .

It is not a de Polignac number, because 63078566605 - 2²¹ = 63076469453 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 (63078566609) 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, 6307856656 + ... + 6307856665.

It is an arithmetic number, because the mean of its divisors is an integer number (18923569983).

Almost surely, 2^63078566605 is an apocalyptic number.

It is an amenable number.

63078566605 is a deficient number, since it is larger than the sum of its proper divisors (12615713327).

63078566605 is a wasteful number, since it uses less digits than its factorization.

63078566605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12615713326.

The product of its (nonzero) digits is 5443200, while the sum is 52.

The spelling of 63078566605 in words is "sixty-three billion, seventy-eight million, five hundred sixty-six thousand, six hundred five".