648713481 has 32 divisors (see below), whose sum is σ = 955584000. Its totient is φ = 388986624.

The previous prime is 648713479. The next prime is 648713503. The reversal of 648713481 is 184317846.

It is not a de Polignac number, because 648713481 - 2¹ = 648713479 is a prime.

It is a super-2 number, since 2×648713481² = 841658360862274722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (648713281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 323520 + ... + 325518.

It is an arithmetic number, because the mean of its divisors is an integer number (29862000).

Almost surely, 2^648713481 is an apocalyptic number.

It is an amenable number.

648713481 is a deficient number, since it is larger than the sum of its proper divisors (306870519).

648713481 is a wasteful number, since it uses less digits than its factorization.

648713481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2225.

The product of its digits is 129024, while the sum is 42.

The square root of 648713481 is about 25469.8543576519. The cubic root of 648713481 is about 865.6672237368.

The spelling of 648713481 in words is "six hundred forty-eight million, seven hundred thirteen thousand, four hundred eighty-one".