648821795 has 8 divisors (see below), whose sum is σ = 783087696. Its totient is φ = 516056416.

The previous prime is 648821773. The next prime is 648821827. The reversal of 648821795 is 597128846.

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 648821795 - 2¹⁴ = 648805411 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 374177 + ... + 375906.

It is an arithmetic number, because the mean of its divisors is an integer number (97885962).

Almost surely, 2^648821795 is an apocalyptic number.

648821795 is a deficient number, since it is larger than the sum of its proper divisors (134265901).

648821795 is a wasteful number, since it uses less digits than its factorization.

648821795 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750261.

The product of its digits is 967680, while the sum is 50.

The square root of 648821795 is about 25471.9805865190. The cubic root of 648821795 is about 865.7154004560.

The spelling of 648821795 in words is "six hundred forty-eight million, eight hundred twenty-one thousand, seven hundred ninety-five".