648140465 has 8 divisors (see below), whose sum is σ = 888878400. Its totient is φ = 444439152.

The previous prime is 648140461. The next prime is 648140477. The reversal of 648140465 is 564041846.

648140465 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 648140465 - 2² = 648140461 is a prime.

It is not an unprimeable number, because it can be changed into a prime (648140461) 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, 9259115 + ... + 9259184.

It is an arithmetic number, because the mean of its divisors is an integer number (111109800).

Almost surely, 2^648140465 is an apocalyptic number.

It is an amenable number.

648140465 is a deficient number, since it is larger than the sum of its proper divisors (240737935).

648140465 is a wasteful number, since it uses less digits than its factorization.

648140465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18518311.

The product of its (nonzero) digits is 92160, while the sum is 38.

The square root of 648140465 is about 25458.6029663845. The cubic root of 648140465 is about 865.4122640825.

The spelling of 648140465 in words is "six hundred forty-eight million, one hundred forty thousand, four hundred sixty-five".