648220022797 has 4 divisors (see below), whose sum is σ = 649957878460. Its totient is φ = 646482167136.

The previous prime is 648220022767. The next prime is 648220022803. The reversal of 648220022797 is 797220022846.

648220022797 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 141113673801 + 507106348996 = 375651^2 + 712114^2 .

It is a cyclic number.

It is not a de Polignac number, because 648220022797 - 2⁷ = 648220022669 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 648220022797.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648220022717) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 868927272 + ... + 868928017.

It is an arithmetic number, because the mean of its divisors is an integer number (162489469615).

Almost surely, 2^648220022797 is an apocalyptic number.

It is an amenable number.

648220022797 is a deficient number, since it is larger than the sum of its proper divisors (1737855663).

648220022797 is a wasteful number, since it uses less digits than its factorization.

648220022797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1737855662.

The product of its (nonzero) digits is 1354752, while the sum is 49.

Adding to 648220022797 its sum of digits (49), we get a palindrome (648220022846).

The spelling of 648220022797 in words is "six hundred forty-eight billion, two hundred twenty million, twenty-two thousand, seven hundred ninety-seven".