63556642139 has 4 divisors (see below), whose sum is σ = 63599043000. Its totient is φ = 63514241280.

The previous prime is 63556642129. The next prime is 63556642181. The reversal of 63556642139 is 93124665536.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63556642139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63556642129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21198182 + ... + 21201179.

It is an arithmetic number, because the mean of its divisors is an integer number (15899760750).

Almost surely, 2^63556642139 is an apocalyptic number.

63556642139 is a deficient number, since it is larger than the sum of its proper divisors (42400861).

63556642139 is a wasteful number, since it uses less digits than its factorization.

63556642139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42400860.

The product of its digits is 3499200, while the sum is 50.

The spelling of 63556642139 in words is "sixty-three billion, five hundred fifty-six million, six hundred forty-two thousand, one hundred thirty-nine".