65364436261640 has 128 divisors (see below), whose sum is σ = 160271352172800. Its totient is φ = 23899090575360.

The previous prime is 65364436261637. The next prime is 65364436261673. The reversal of 65364436261640 is 4616263446356.

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 in 31 ways as a sum of consecutive naturals, for example, 6868685 + ... + 13338204.

It is an arithmetic number, because the mean of its divisors is an integer number (1252119938850).

Almost surely, 2^{65364436261640} is an apocalyptic number.

It is an amenable number.

65364436261640 is an abundant number, since it is smaller than the sum of its proper divisors (94906915911160).

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

65364436261640 is a wasteful number, since it uses less digits than its factorization.

65364436261640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20207055 (or 20207051 counting only the distinct ones).

The product of its (nonzero) digits is 44789760, while the sum is 56.

The spelling of 65364436261640 in words is "sixty-five trillion, three hundred sixty-four billion, four hundred thirty-six million, two hundred sixty-one thousand, six hundred forty".