648137318 has 16 divisors (see below), whose sum is σ = 991362240. Its totient is φ = 317693376.

The previous prime is 648137311. The next prime is 648137333. The reversal of 648137318 is 813731846.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648137311) 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, 219971 + ... + 222897.

It is an arithmetic number, because the mean of its divisors is an integer number (61960140).

Almost surely, 2^648137318 is an apocalyptic number.

648137318 is a deficient number, since it is larger than the sum of its proper divisors (343224922).

648137318 is a wasteful number, since it uses less digits than its factorization.

648137318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5071.

The product of its digits is 96768, while the sum is 41.

The square root of 648137318 is about 25458.5411600901. The cubic root of 648137318 is about 865.4108634310.

The spelling of 648137318 in words is "six hundred forty-eight million, one hundred thirty-seven thousand, three hundred eighteen".