648441715 has 8 divisors (see below), whose sum is σ = 785834928. Its totient is φ = 513616800.

The previous prime is 648441713. The next prime is 648441749. The reversal of 648441715 is 517144846.

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

It is not a de Polignac number, because 648441715 - 2¹ = 648441713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (648441713) 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, 641517 + ... + 642526.

It is an arithmetic number, because the mean of its divisors is an integer number (98229366).

Almost surely, 2^648441715 is an apocalyptic number.

648441715 is a deficient number, since it is larger than the sum of its proper divisors (137393213).

648441715 is a wasteful number, since it uses less digits than its factorization.

648441715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1284149.

The product of its digits is 107520, while the sum is 40.

The square root of 648441715 is about 25464.5187466797. The cubic root of 648441715 is about 865.5463219901.

The spelling of 648441715 in words is "six hundred forty-eight million, four hundred forty-one thousand, seven hundred fifteen".