65364436261638 has 12 divisors (see below), whose sum is σ = 141622945233588. Its totient is φ = 21788145420540.

The previous prime is 65364436261637. The next prime is 65364436261673. The reversal of 65364436261638 is 83616263446356.

65364436261638 is a `hidden beast` number, since 6 + 5 + 3 + 6 + 4 + 4 + 3 + 6 + 2 + 616 + 3 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65364436261633) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1815678785028 + ... + 1815678785063.

It is an arithmetic number, because the mean of its divisors is an integer number (11801912102799).

Almost surely, 2^{65364436261638} is an apocalyptic number.

65364436261638 is an abundant number, since it is smaller than the sum of its proper divisors (76258508971950).

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

65364436261638 is a wasteful number, since it uses less digits than its factorization.

65364436261638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3631357570099 (or 3631357570096 counting only the distinct ones).

The product of its digits is 268738560, while the sum is 63.

The spelling of 65364436261638 in words is "sixty-five trillion, three hundred sixty-four billion, four hundred thirty-six million, two hundred sixty-one thousand, six hundred thirty-eight".