64868405072 has 10 divisors (see below), whose sum is σ = 125682534858. Its totient is φ = 32434202528.

The previous prime is 64868405059. The next prime is 64868405089. The reversal of 64868405072 is 27050486846.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 55745098816 + 9123306256 = 236104^2 + 95516^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 64868405072.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2027137643 + ... + 2027137674.

Almost surely, 2^64868405072 is an apocalyptic number.

It is an amenable number.

64868405072 is a deficient number, since it is larger than the sum of its proper divisors (60814129786).

64868405072 is a wasteful number, since it uses less digits than its factorization.

64868405072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4054275325 (or 4054275319 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 50.

The spelling of 64868405072 in words is "sixty-four billion, eight hundred sixty-eight million, four hundred five thousand, seventy-two".