648769745 has 8 divisors (see below), whose sum is σ = 838410216. Its totient is φ = 479091456.

The previous prime is 648769739. The next prime is 648769753. The reversal of 648769745 is 547967846.

648769745 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 33779344 + 614990401 = 5812^2 + 24799^2 .

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 648769745 - 2¹⁰ = 648768721 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4990472 + ... + 4990601.

It is an arithmetic number, because the mean of its divisors is an integer number (104801277).

Almost surely, 2^648769745 is an apocalyptic number.

648769745 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

648769745 is a deficient number, since it is larger than the sum of its proper divisors (189640471).

648769745 is a wasteful number, since it uses less digits than its factorization.

648769745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9981091.

The product of its digits is 10160640, while the sum is 56.

The square root of 648769745 is about 25470.9588551354. The cubic root of 648769745 is about 865.6922499330.

The spelling of 648769745 in words is "six hundred forty-eight million, seven hundred sixty-nine thousand, seven hundred forty-five".