63746819005 has 4 divisors (see below), whose sum is σ = 76496182812. Its totient is φ = 50997455200.

The previous prime is 63746818951. The next prime is 63746819029. The reversal of 63746819005 is 50091864736.

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 44670513316 + 19076305689 = 211354^2 + 138117^2 .

It is not a de Polignac number, because 63746819005 - 2¹¹ = 63746816957 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 63746819005.

It is a congruent number.

It is an unprimeable number.

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, 6374681896 + ... + 6374681905.

It is an arithmetic number, because the mean of its divisors is an integer number (19124045703).

Almost surely, 2^63746819005 is an apocalyptic number.

It is an amenable number.

63746819005 is a deficient number, since it is larger than the sum of its proper divisors (12749363807).

63746819005 is a wasteful number, since it uses less digits than its factorization.

63746819005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12749363806.

The product of its (nonzero) digits is 1088640, while the sum is 49.

The spelling of 63746819005 in words is "sixty-three billion, seven hundred forty-six million, eight hundred nineteen thousand, five".