648246621 has 16 divisors (see below), whose sum is σ = 944781120. Its totient is φ = 392094720.

The previous prime is 648246589. The next prime is 648246667. The reversal of 648246621 is 126642846.

It is not a de Polignac number, because 648246621 - 2⁵ = 648246589 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 648246621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648246721) 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, 2500 + ... + 36093.

It is an arithmetic number, because the mean of its divisors is an integer number (59048820).

Almost surely, 2^648246621 is an apocalyptic number.

It is an amenable number.

648246621 is a deficient number, since it is larger than the sum of its proper divisors (296534499).

648246621 is a wasteful number, since it uses less digits than its factorization.

648246621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39116.

The product of its digits is 110592, while the sum is 39.

The square root of 648246621 is about 25460.6877558325. The cubic root of 648246621 is about 865.4595088255.

The spelling of 648246621 in words is "six hundred forty-eight million, two hundred forty-six thousand, six hundred twenty-one".