648745895 has 16 divisors (see below), whose sum is σ = 893265408. Its totient is φ = 443076000.

The previous prime is 648745883. The next prime is 648745931. The reversal of 648745895 is 598547846.

It is a happy number.

It is not a de Polignac number, because 648745895 - 2⁴ = 648745879 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 648745895.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28139 + ... + 45708.

It is an arithmetic number, because the mean of its divisors is an integer number (55829088).

Almost surely, 2^648745895 is an apocalyptic number.

648745895 is a deficient number, since it is larger than the sum of its proper divisors (244519513).

648745895 is a wasteful number, since it uses less digits than its factorization.

648745895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74110.

The product of its digits is 9676800, while the sum is 56.

The square root of 648745895 is about 25470.4906705780. The cubic root of 648745895 is about 865.6816416428.

The spelling of 648745895 in words is "six hundred forty-eight million, seven hundred forty-five thousand, eight hundred ninety-five".