647519358913 has 4 divisors (see below), whose sum is σ = 740022124480. Its totient is φ = 555016593348.

The previous prime is 647519358911. The next prime is 647519358929. The reversal of 647519358913 is 319853915746.

It is a happy number.

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 not a de Polignac number, because 647519358913 - 2¹ = 647519358911 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (647519358911) 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, 46251382773 + ... + 46251382786.

It is an arithmetic number, because the mean of its divisors is an integer number (185005531120).

Almost surely, 2^647519358913 is an apocalyptic number.

It is an amenable number.

647519358913 is a deficient number, since it is larger than the sum of its proper divisors (92502765567).

647519358913 is an equidigital number, since it uses as much as digits as its factorization.

647519358913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92502765566.

The product of its digits is 24494400, while the sum is 61.

The spelling of 647519358913 in words is "six hundred forty-seven billion, five hundred nineteen million, three hundred fifty-eight thousand, nine hundred thirteen".