65071765512 has 144 divisors (see below), whose sum is σ = 194539346820. Its totient is φ = 19533265920.

The previous prime is 65071765511. The next prime is 65071765543. The reversal of 65071765512 is 21556717056.

65071765512 is a `hidden beast` number, since 6 + 5 + 0 + 71 + 7 + 65 + 512 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 842973156 + 64228792356 = 29034^2 + 253434^2 .

It is not an unprimeable number, because it can be changed into a prime (65071765511) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1552738 + ... + 1594094.

Almost surely, 2^65071765512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65071765512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97269673410).

65071765512 is an abundant number, since it is smaller than the sum of its proper divisors (129467581308).

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

65071765512 is a wasteful number, since it uses less digits than its factorization.

65071765512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41464 (or 41416 counting only the distinct ones).

The product of its (nonzero) digits is 441000, while the sum is 45.

The spelling of 65071765512 in words is "sixty-five billion, seventy-one million, seven hundred sixty-five thousand, five hundred twelve".