648422279 has 12 divisors (see below), whose sum is σ = 717723216. Its totient is φ = 583737792.

The previous prime is 648422273. The next prime is 648422297. The reversal of 648422279 is 972224846.

It is not a de Polignac number, because 648422279 - 2⁸ = 648422023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648422273) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27059 + ... + 45044.

It is an arithmetic number, because the mean of its divisors is an integer number (59810268).

Almost surely, 2^648422279 is an apocalyptic number.

648422279 is a deficient number, since it is larger than the sum of its proper divisors (69300937).

648422279 is a wasteful number, since it uses less digits than its factorization.

648422279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72166 (or 72143 counting only the distinct ones).

The product of its digits is 387072, while the sum is 44.

The square root of 648422279 is about 25464.1371147738. The cubic root of 648422279 is about 865.5376741163.

The spelling of 648422279 in words is "six hundred forty-eight million, four hundred twenty-two thousand, two hundred seventy-nine".