648401465 has 16 divisors (see below), whose sum is σ = 790217856. Its totient is φ = 510652800.

The previous prime is 648401461. The next prime is 648401473. The reversal of 648401465 is 564104846.

648401465 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 648401465 - 2² = 648401461 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (648401461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 422750 + ... + 424280.

It is an arithmetic number, because the mean of its divisors is an integer number (49388616).

Almost surely, 2^648401465 is an apocalyptic number.

It is an amenable number.

648401465 is a deficient number, since it is larger than the sum of its proper divisors (141816391).

648401465 is a wasteful number, since it uses less digits than its factorization.

648401465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2800.

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

The square root of 648401465 is about 25463.7284190670. The cubic root of 648401465 is about 865.5284129221.

The spelling of 648401465 in words is "six hundred forty-eight million, four hundred one thousand, four hundred sixty-five".