648761583 has 16 divisors (see below), whose sum is σ = 895104000. Its totient is φ = 417531840.

The previous prime is 648761579. The next prime is 648761629. The reversal of 648761583 is 385167846.

It is not a de Polignac number, because 648761583 - 2² = 648761579 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648761513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30643 + ... + 47291.

It is an arithmetic number, because the mean of its divisors is an integer number (55944000).

Almost surely, 2^648761583 is an apocalyptic number.

648761583 is a deficient number, since it is larger than the sum of its proper divisors (246342417).

648761583 is a wasteful number, since it uses less digits than its factorization.

648761583 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17102.

The product of its digits is 967680, while the sum is 48.

The square root of 648761583 is about 25470.7986329444. The cubic root of 648761583 is about 865.6886195696.

The spelling of 648761583 in words is "six hundred forty-eight million, seven hundred sixty-one thousand, five hundred eighty-three".