65485311945561 has 12 divisors (see below), whose sum is σ = 94590300687792. Its totient is φ = 43656687404856.

The previous prime is 65485311945541. The next prime is 65485311945587. The reversal of 65485311945561 is 16554911358456.

65485311945561 is a `hidden beast` number, since 6 + 5 + 4 + 8 + 5 + 3 + 119 + 455 + 61 = 666.

It is not a de Polignac number, because 65485311945561 - 2⁷ = 65485311945433 is a prime.

It is a super-3 number, since 3×65485311945561³ (a number of 42 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (65485311945541) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13370131 + ... + 17599176.

It is an arithmetic number, because the mean of its divisors is an integer number (7882525057316).

Almost surely, 2^{65485311945561} is an apocalyptic number.

It is an amenable number.

65485311945561 is a deficient number, since it is larger than the sum of its proper divisors (29104988742231).

65485311945561 is a wasteful number, since it uses less digits than its factorization.

65485311945561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31204260 (or 31204257 counting only the distinct ones).

The product of its digits is 77760000, while the sum is 63.

The spelling of 65485311945561 in words is "sixty-five trillion, four hundred eighty-five billion, three hundred eleven million, nine hundred forty-five thousand, five hundred sixty-one".