63081605005 has 4 divisors (see below), whose sum is σ = 75697926012. Its totient is φ = 50465284000.

The previous prime is 63081604997. The next prime is 63081605009. The reversal of 63081605005 is 50050618036.

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 31350951844 + 31730653161 = 177062^2 + 178131^2 .

It is not a de Polignac number, because 63081605005 - 2³ = 63081604997 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 (63081605009) 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, 6308160496 + ... + 6308160505.

It is an arithmetic number, because the mean of its divisors is an integer number (18924481503).

Almost surely, 2^63081605005 is an apocalyptic number.

It is an amenable number.

63081605005 is a deficient number, since it is larger than the sum of its proper divisors (12616321007).

63081605005 is a wasteful number, since it uses less digits than its factorization.

63081605005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12616321006.

The product of its (nonzero) digits is 21600, while the sum is 34.

The spelling of 63081605005 in words is "sixty-three billion, eighty-one million, six hundred five thousand, five".