648398673923 has 32 divisors (see below), whose sum is σ = 891810888192. Its totient is φ = 455005497600.

The previous prime is 648398673887. The next prime is 648398673931. The reversal of 648398673923 is 329376893846.

It is a cyclic number.

It is not a de Polignac number, because 648398673923 - 2⁶ = 648398673859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (648398673623) 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 31 ways as a sum of consecutive naturals, for example, 7858361 + ... + 7940442.

It is an arithmetic number, because the mean of its divisors is an integer number (27869090256).

Almost surely, 2^648398673923 is an apocalyptic number.

648398673923 is a deficient number, since it is larger than the sum of its proper divisors (243412214269).

648398673923 is a wasteful number, since it uses less digits than its factorization.

648398673923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15798875.

The product of its digits is 282175488, while the sum is 68.

The spelling of 648398673923 in words is "six hundred forty-eight billion, three hundred ninety-eight million, six hundred seventy-three thousand, nine hundred twenty-three".