64204240066040 has 32 divisors (see below), whose sum is σ = 144459785875680. Its totient is φ = 25681652341632.

The previous prime is 64204240066037. The next prime is 64204240066049. The reversal of 64204240066040 is 4066004240246.

It is a super-2 number, since 2×64204240066040² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64204240065985 and 64204240066003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64204240066049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33330917 + ... + 35204523.

It is an arithmetic number, because the mean of its divisors is an integer number (4514368308615).

Almost surely, 2^{64204240066040} is an apocalyptic number.

It is an amenable number.

64204240066040 is an abundant number, since it is smaller than the sum of its proper divisors (80255545809640).

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

64204240066040 is a wasteful number, since it uses less digits than its factorization.

64204240066040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2730311 (or 2730307 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 38.

The spelling of 64204240066040 in words is "sixty-four trillion, two hundred four billion, two hundred forty million, sixty-six thousand, forty".