648718194 has 16 divisors (see below), whose sum is σ = 1299215232. Its totient is φ = 215942928.

The previous prime is 648718193. The next prime is 648718207. The reversal of 648718194 is 491817846.

It is not an unprimeable number, because it can be changed into a prime (648718193) 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, 69354 + ... + 78149.

It is an arithmetic number, because the mean of its divisors is an integer number (81200952).

Almost surely, 2^648718194 is an apocalyptic number.

648718194 is an abundant number, since it is smaller than the sum of its proper divisors (650497038).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

648718194 is a wasteful number, since it uses less digits than its factorization.

648718194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148241.

The product of its digits is 387072, while the sum is 48.

The square root of 648718194 is about 25469.9468786254. The cubic root of 648718194 is about 865.6693201321.

The spelling of 648718194 in words is "six hundred forty-eight million, seven hundred eighteen thousand, one hundred ninety-four".