648035595491 has 4 divisors (see below), whose sum is σ = 655843253352. Its totient is φ = 640227937632.

The previous prime is 648035595481. The next prime is 648035595509. The reversal of 648035595491 is 194595530846.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 648035595491 - 2³⁰ = 646961853667 is a prime.

It is a super-3 number, since 3×648035595491³ (a number of 36 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 648035595491.

It is not an unprimeable number, because it can be changed into a prime (648035595481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3903828806 + ... + 3903828971.

It is an arithmetic number, because the mean of its divisors is an integer number (163960813338).

Almost surely, 2^648035595491 is an apocalyptic number.

648035595491 is a deficient number, since it is larger than the sum of its proper divisors (7807657861).

648035595491 is an equidigital number, since it uses as much as digits as its factorization.

648035595491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7807657860.

The product of its (nonzero) digits is 23328000, while the sum is 59.

The spelling of 648035595491 in words is "six hundred forty-eight billion, thirty-five million, five hundred ninety-five thousand, four hundred ninety-one".