63906273913 has 4 divisors (see below), whose sum is σ = 63975813760. Its totient is φ = 63836734068.

The previous prime is 63906273863. The next prime is 63906273947. The reversal of 63906273913 is 31937260936.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63906273913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63906373913) 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, 34768545 + ... + 34770382.

It is an arithmetic number, because the mean of its divisors is an integer number (15993953440).

Almost surely, 2^63906273913 is an apocalyptic number.

It is an amenable number.

63906273913 is a deficient number, since it is larger than the sum of its proper divisors (69539847).

63906273913 is an equidigital number, since it uses as much as digits as its factorization.

63906273913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69539846.

The product of its (nonzero) digits is 1102248, while the sum is 49.

The spelling of 63906273913 in words is "sixty-three billion, nine hundred six million, two hundred seventy-three thousand, nine hundred thirteen".