64823321488040 has 64 divisors (see below), whose sum is σ = 154699678040400. Its totient is φ = 24361779068928.

The previous prime is 64823321488021. The next prime is 64823321488067. The reversal of 64823321488040 is 4088412332846.

It can be written as a sum of positive squares in 8 ways, for example, as 60626747997124 + 4196573490916 = 7786318^2 + 2048554^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82214585 + ... + 82999304.

Almost surely, 2^{64823321488040} is an apocalyptic number.

It is an amenable number.

64823321488040 is an abundant number, since it is smaller than the sum of its proper divisors (89876356552360).

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

64823321488040 is a wasteful number, since it uses less digits than its factorization.

64823321488040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165214494 (or 165214490 counting only the distinct ones).

The product of its (nonzero) digits is 7077888, while the sum is 53.

The spelling of 64823321488040 in words is "sixty-four trillion, eight hundred twenty-three billion, three hundred twenty-one million, four hundred eighty-eight thousand, forty".