648560811 has 8 divisors (see below), whose sum is σ = 864887760. Its totient is φ = 432303872.

The previous prime is 648560777. The next prime is 648560813. The reversal of 648560811 is 118065846.

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 648560811 - 2¹⁰ = 648559787 is a prime.

It is a super-2 number, since 2×648560811² = 841262251129955442, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 648560811.

It is not an unprimeable number, because it can be changed into a prime (648560813) 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, 10531 + ... + 37523.

It is an arithmetic number, because the mean of its divisors is an integer number (108110970).

Almost surely, 2^648560811 is an apocalyptic number.

648560811 is a deficient number, since it is larger than the sum of its proper divisors (216326949).

648560811 is a wasteful number, since it uses less digits than its factorization.

648560811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35005.

The product of its (nonzero) digits is 46080, while the sum is 39.

The square root of 648560811 is about 25466.8571087993. The cubic root of 648560811 is about 865.5993089136.

The spelling of 648560811 in words is "six hundred forty-eight million, five hundred sixty thousand, eight hundred eleven".