648516418804799 has 4 divisors (see below), whose sum is σ = 648521621920536. Its totient is φ = 648511215689064.

The previous prime is 648516418804789. The next prime is 648516418804811. The reversal of 648516418804799 is 997408814615846.

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

It is a cyclic number.

It is not a de Polignac number, because 648516418804799 - 2²⁴ = 648516402027583 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 (648516418804729) 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, 2601370904 + ... + 2601620189.

It is an arithmetic number, because the mean of its divisors is an integer number (162130405480134).

Almost surely, 2^{648516418804799} is an apocalyptic number.

648516418804799 is a deficient number, since it is larger than the sum of its proper divisors (5203115737).

648516418804799 is a wasteful number, since it uses less digits than its factorization.

648516418804799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5203115736.

The product of its (nonzero) digits is 3344302080, while the sum is 80.

The spelling of 648516418804799 in words is "six hundred forty-eight trillion, five hundred sixteen billion, four hundred eighteen million, eight hundred four thousand, seven hundred ninety-nine".