648320920023 has 16 divisors (see below), whose sum is σ = 987934371840. Its totient is φ = 370462804896.

The previous prime is 648320920007. The next prime is 648320920031. The reversal of 648320920023 is 320029023846.

It is not a de Polignac number, because 648320920023 - 2⁴ = 648320920007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648320920003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1190986 + ... + 1647752.

It is an arithmetic number, because the mean of its divisors is an integer number (61745898240).

Almost surely, 2^648320920023 is an apocalyptic number.

648320920023 is a deficient number, since it is larger than the sum of its proper divisors (339613451817).

648320920023 is a wasteful number, since it uses less digits than its factorization.

648320920023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524366.

The product of its (nonzero) digits is 124416, while the sum is 39.

Adding to 648320920023 its reverse (320029023846), we get a palindrome (968349943869).

The spelling of 648320920023 in words is "six hundred forty-eight billion, three hundred twenty million, nine hundred twenty thousand, twenty-three".