6501242646 has 48 divisors (see below), whose sum is σ = 14941227600. Its totient is φ = 2035966464.

The previous prime is 6501242599. The next prime is 6501242647. The reversal of 6501242646 is 6462421056.

6501242646 is a `hidden beast` number, since 6 + 5 + 0 + 1 + 2 + 4 + 2 + 646 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 6501242646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6501242647) 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 23 ways as a sum of consecutive naturals, for example, 155445 + ... + 192783.

It is an arithmetic number, because the mean of its divisors is an integer number (311275575).

Almost surely, 2^6501242646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6501242646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7470613800).

6501242646 is an abundant number, since it is smaller than the sum of its proper divisors (8439984954).

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

6501242646 is a wasteful number, since it uses less digits than its factorization.

6501242646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37933 (or 37930 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The square root of 6501242646 is about 80630.2836780325. The cubic root of 6501242646 is about 1866.3744987809.

The spelling of 6501242646 in words is "six billion, five hundred one million, two hundred forty-two thousand, six hundred forty-six".