648440514 has 12 divisors (see below), whose sum is σ = 1404954486. Its totient is φ = 216146832.

The previous prime is 648440509. The next prime is 648440521. The reversal of 648440514 is 415044846.

It is a happy number.

648440514 is a `hidden beast` number, since 64 + 84 + 4 + 0 + 514 = 666.

It can be written as a sum of positive squares in only one way, i.e., 361646289 + 286794225 = 19017^2 + 16935^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18012219 + ... + 18012254.

Almost surely, 2^648440514 is an apocalyptic number.

648440514 is an abundant number, since it is smaller than the sum of its proper divisors (756513972).

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

648440514 is a wasteful number, since it uses less digits than its factorization.

648440514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36024481 (or 36024478 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 36.

The square root of 648440514 is about 25464.4951648369. The cubic root of 648440514 is about 865.5457876210.

The spelling of 648440514 in words is "six hundred forty-eight million, four hundred forty thousand, five hundred fourteen".