65324918793981 has 64 divisors (see below), whose sum is σ = 112339905638400. Its totient is φ = 32763893299200.

The previous prime is 65324918793973. The next prime is 65324918793991. The reversal of 65324918793981 is 18939781942356.

It is not a de Polignac number, because 65324918793981 - 2³ = 65324918793973 is a prime.

It is a super-2 number, since 2×65324918793981² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65324918793941) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 266772480 + ... + 267017238.

It is an arithmetic number, because the mean of its divisors is an integer number (1755311025600).

Almost surely, 2^{65324918793981} is an apocalyptic number.

It is an amenable number.

65324918793981 is a deficient number, since it is larger than the sum of its proper divisors (47014986844419).

65324918793981 is a wasteful number, since it uses less digits than its factorization.

65324918793981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284650.

The product of its digits is 705438720, while the sum is 75.

The spelling of 65324918793981 in words is "sixty-five trillion, three hundred twenty-four billion, nine hundred eighteen million, seven hundred ninety-three thousand, nine hundred eighty-one".