648563260801 has 8 divisors (see below), whose sum is σ = 651987847784. Its totient is φ = 645146467200.

The previous prime is 648563260777. The next prime is 648563260837. The reversal of 648563260801 is 108062365846.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 18611507776 + 629951753025 = 136424^2 + 793695^2 .

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 648563260801 - 2⁷ = 648563260673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (648563264801) 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, 1781430 + ... + 2114383.

It is an arithmetic number, because the mean of its divisors is an integer number (81498480973).

Almost surely, 2^648563260801 is an apocalyptic number.

It is an amenable number.

648563260801 is a deficient number, since it is larger than the sum of its proper divisors (3424586983).

648563260801 is a wasteful number, since it uses less digits than its factorization.

648563260801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3896691.

The product of its (nonzero) digits is 1658880, while the sum is 49.

The spelling of 648563260801 in words is "six hundred forty-eight billion, five hundred sixty-three million, two hundred sixty thousand, eight hundred one".