65266540515216 has 120 divisors (see below), whose sum is σ = 183976310700000. Its totient is φ = 21598227012096.

The previous prime is 65266540515203. The next prime is 65266540515223. The reversal of 65266540515216 is 61251504566256.

65266540515216 is a `hidden beast` number, since 6 + 5 + 2 + 6 + 6 + 5 + 405 + 15 + 216 = 666.

It is a super-2 number, since 2×65266540515216² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 933691435 + ... + 933761333.

It is an arithmetic number, because the mean of its divisors is an integer number (1533135922500).

Almost surely, 2^{65266540515216} 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 65266540515216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91988155350000).

65266540515216 is an abundant number, since it is smaller than the sum of its proper divisors (118709770184784).

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

65266540515216 is a wasteful number, since it uses less digits than its factorization.

65266540515216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116701 (or 116692 counting only the distinct ones).

The product of its (nonzero) digits is 12960000, while the sum is 54.

The spelling of 65266540515216 in words is "sixty-five trillion, two hundred sixty-six billion, five hundred forty million, five hundred fifteen thousand, two hundred sixteen".