650125018 has 4 divisors (see below), whose sum is σ = 975187530. Its totient is φ = 325062508.

The previous prime is 650125013. The next prime is 650125027. The reversal of 650125018 is 810521056.

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

It can be written as a sum of positive squares in only one way, i.e., 406546569 + 243578449 = 20163^2 + 15607^2 .

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (650125013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 162531253 + ... + 162531256.

Almost surely, 2^650125018 is an apocalyptic number.

650125018 is a deficient number, since it is larger than the sum of its proper divisors (325062512).

650125018 is a wasteful number, since it uses less digits than its factorization.

650125018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325062511.

The product of its (nonzero) digits is 2400, while the sum is 28.

The square root of 650125018 is about 25497.5492547813. The cubic root of 650125018 is about 866.2946379246.

The spelling of 650125018 in words is "six hundred fifty million, one hundred twenty-five thousand, eighteen".