648068724 has 18 divisors (see below), whose sum is σ = 1638173810. Its totient is φ = 216022896.

The previous prime is 648068699. The next prime is 648068749. The reversal of 648068724 is 427860846.

648068724 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (648068699) and next prime (648068749).

It can be written as a sum of positive squares in only one way, i.e., 567392400 + 80676324 = 23820^2 + 8982^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a self number, because there is not a number n which added to its sum of digits gives 648068724.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9000919 + ... + 9000990.

Almost surely, 2^648068724 is an apocalyptic number.

It is an amenable number.

648068724 is an abundant number, since it is smaller than the sum of its proper divisors (990105086).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

648068724 is a wasteful number, since it uses less digits than its factorization.

648068724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18001919 (or 18001914 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 45.

The square root of 648068724 is about 25457.1939537727. The cubic root of 648068724 is about 865.3803328189.

The spelling of 648068724 in words is "six hundred forty-eight million, sixty-eight thousand, seven hundred twenty-four".