648858871 has 2 divisors, whose sum is σ = 648858872. Its totient is φ = 648858870.

The previous prime is 648858787. The next prime is 648858901. The reversal of 648858871 is 178858846.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 648858871 - 2²⁵ = 615304439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (648858571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324429435 + 324429436.

It is an arithmetic number, because the mean of its divisors is an integer number (324429436).

Almost surely, 2^648858871 is an apocalyptic number.

648858871 is a deficient number, since it is larger than the sum of its proper divisors (1).

648858871 is an equidigital number, since it uses as much as digits as its factorization.

648858871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3440640, while the sum is 55.

The square root of 648858871 is about 25472.7083561996. The cubic root of 648858871 is about 865.7318901676.

The spelling of 648858871 in words is "six hundred forty-eight million, eight hundred fifty-eight thousand, eight hundred seventy-one".