648767623 has 4 divisors (see below), whose sum is σ = 741448720. Its totient is φ = 556086528.

The previous prime is 648767621. The next prime is 648767663. The reversal of 648767623 is 326767846.

648767623 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 648767623 - 2¹ = 648767621 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 (648767621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46340538 + ... + 46340551.

It is an arithmetic number, because the mean of its divisors is an integer number (185362180).

Almost surely, 2^648767623 is an apocalyptic number.

648767623 is a deficient number, since it is larger than the sum of its proper divisors (92681097).

648767623 is an equidigital number, since it uses as much as digits as its factorization.

648767623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92681096.

The product of its digits is 2032128, while the sum is 49.

The square root of 648767623 is about 25470.9171998183. The cubic root of 648767623 is about 865.6913060948.

The spelling of 648767623 in words is "six hundred forty-eight million, seven hundred sixty-seven thousand, six hundred twenty-three".