648456139859 has 4 divisors (see below), whose sum is σ = 707406698040. Its totient is φ = 589505581680.

The previous prime is 648456139843. The next prime is 648456139873. The reversal of 648456139859 is 958931654846.

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 648456139859 - 2⁴ = 648456139843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (648456139159) 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, 29475279074 + ... + 29475279095.

It is an arithmetic number, because the mean of its divisors is an integer number (176851674510).

Almost surely, 2^648456139859 is an apocalyptic number.

648456139859 is a deficient number, since it is larger than the sum of its proper divisors (58950558181).

648456139859 is a wasteful number, since it uses less digits than its factorization.

648456139859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58950558180.

The product of its digits is 223948800, while the sum is 68.

The spelling of 648456139859 in words is "six hundred forty-eight billion, four hundred fifty-six million, one hundred thirty-nine thousand, eight hundred fifty-nine".