64243021602 has 16 divisors (see below), whose sum is σ = 128503928160. Its totient is φ = 21411359712.

The previous prime is 64243021589. The next prime is 64243021643. The reversal of 64243021602 is 20612034246.

It is a self number, because there is not a number n which added to its sum of digits gives 64243021602.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 698283 + ... + 784910.

It is an arithmetic number, because the mean of its divisors is an integer number (8031495510).

Almost surely, 2^64243021602 is an apocalyptic number.

64243021602 is an abundant number, since it is smaller than the sum of its proper divisors (64260906558).

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

64243021602 is a wasteful number, since it uses less digits than its factorization.

64243021602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1490417.

The product of its (nonzero) digits is 13824, while the sum is 30.

Adding to 64243021602 its reverse (20612034246), we get a palindrome (84855055848).

The spelling of 64243021602 in words is "sixty-four billion, two hundred forty-three million, twenty-one thousand, six hundred two".