6385250644 has 6 divisors (see below), whose sum is σ = 11174188634. Its totient is φ = 3192625320.

The previous prime is 6385250623. The next prime is 6385250657. The reversal of 6385250644 is 4460525836.

It can be written as a sum of positive squares in only one way, i.e., 6038844100 + 346406544 = 77710^2 + 18612^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 6385250644.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 798156327 + ... + 798156334.

Almost surely, 2^6385250644 is an apocalyptic number.

It is an amenable number.

6385250644 is a deficient number, since it is larger than the sum of its proper divisors (4788937990).

6385250644 is a wasteful number, since it uses less digits than its factorization.

6385250644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1596312665 (or 1596312663 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 43.

The square root of 6385250644 is about 79907.7633525054. The cubic root of 6385250644 is about 1855.2081771000.

The spelling of 6385250644 in words is "six billion, three hundred eighty-five million, two hundred fifty thousand, six hundred forty-four".