648823998539 has 4 divisors (see below), whose sum is σ = 648886776024. Its totient is φ = 648761221056.

The previous prime is 648823998523. The next prime is 648823998551. The reversal of 648823998539 is 935899328846.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 935899328846 = 2 ⋅467949664423.

It is a cyclic number.

It is not a de Polignac number, because 648823998539 - 2⁴ = 648823998523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (648823998239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31373237 + ... + 31393910.

It is an arithmetic number, because the mean of its divisors is an integer number (162221694006).

Almost surely, 2^648823998539 is an apocalyptic number.

648823998539 is a deficient number, since it is larger than the sum of its proper divisors (62777485).

648823998539 is a wasteful number, since it uses less digits than its factorization.

648823998539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62777484.

The product of its digits is 806215680, while the sum is 74.

The spelling of 648823998539 in words is "six hundred forty-eight billion, eight hundred twenty-three million, nine hundred ninety-eight thousand, five hundred thirty-nine".