648128299 has 8 divisors (see below), whose sum is σ = 797696480. Its totient is φ = 512804736.

The previous prime is 648128291. The next prime is 648128309. The reversal of 648128299 is 992821846.

648128299 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 648128299 - 2³ = 648128291 is a prime.

It is not an unprimeable number, because it can be changed into a prime (648128291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3561054 + ... + 3561235.

It is an arithmetic number, because the mean of its divisors is an integer number (99712060).

Almost surely, 2^648128299 is an apocalyptic number.

648128299 is a deficient number, since it is larger than the sum of its proper divisors (149568181).

648128299 is a wasteful number, since it uses less digits than its factorization.

648128299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7122309.

The product of its digits is 497664, while the sum is 49.

The square root of 648128299 is about 25458.3640283503. The cubic root of 648128299 is about 865.4068492730.

The spelling of 648128299 in words is "six hundred forty-eight million, one hundred twenty-eight thousand, two hundred ninety-nine".