648411959 has 4 divisors (see below), whose sum is σ = 698289816. Its totient is φ = 598534104.

The previous prime is 648411949. The next prime is 648412003. The reversal of 648411959 is 959114846.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-648411959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648411919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24938909 + ... + 24938934.

It is an arithmetic number, because the mean of its divisors is an integer number (174572454).

Almost surely, 2^648411959 is an apocalyptic number.

648411959 is a deficient number, since it is larger than the sum of its proper divisors (49877857).

648411959 is a wasteful number, since it uses less digits than its factorization.

648411959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49877856.

The product of its digits is 311040, while the sum is 47.

The square root of 648411959 is about 25463.9344760389. The cubic root of 648411959 is about 865.5330822547.

The spelling of 648411959 in words is "six hundred forty-eight million, four hundred eleven thousand, nine hundred fifty-nine".