65538788783556 has 96 divisors (see below), whose sum is σ = 170345688041088. Its totient is φ = 19445201141760.

The previous prime is 65538788783551. The next prime is 65538788783581.

65538788783556 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (65538788783551) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23502685 + ... + 26142948.

It is an arithmetic number, because the mean of its divisors is an integer number (1774434250428).

Almost surely, 2^{65538788783556} is an apocalyptic number.

65538788783556 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

65538788783556 is an abundant number, since it is smaller than the sum of its proper divisors (104806899257532).

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

65538788783556 is a wasteful number, since it uses less digits than its factorization.

65538788783556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49645861 (or 49645859 counting only the distinct ones).

The product of its digits is 40642560000, while the sum is 84.

The spelling of 65538788783556 in words is "sixty-five trillion, five hundred thirty-eight billion, seven hundred eighty-eight million, seven hundred eighty-three thousand, five hundred fifty-six".