65728878556212 has 36 divisors (see below), whose sum is σ = 166170731211940. Its totient is φ = 21906628474752.

The previous prime is 65728878556199. The next prime is 65728878556279. The reversal of 65728878556212 is 21265587882756.

65728878556212 is a `hidden beast` number, since 6 + 5 + 7 + 288 + 7 + 85 + 56 + 212 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 9020207329956 + 56708671226256 = 3003366^2 + 7530516^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 124637833 + ... + 125164080.

Almost surely, 2^{65728878556212} is an apocalyptic number.

It is an amenable number.

65728878556212 is an abundant number, since it is smaller than the sum of its proper divisors (100441852655728).

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

65728878556212 is a wasteful number, since it uses less digits than its factorization.

65728878556212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249809232 (or 249809227 counting only the distinct ones).

The product of its digits is 903168000, while the sum is 72.

The spelling of 65728878556212 in words is "sixty-five trillion, seven hundred twenty-eight billion, eight hundred seventy-eight million, five hundred fifty-six thousand, two hundred twelve".