65297825981856 has 960 divisors, whose sum is σ = 223917440947200. Its totient is φ = 18487827431424.

The previous prime is 65297825981849. The next prime is 65297825981951. The reversal of 65297825981856 is 65818952879256.

65297825981856 is a `hidden beast` number, since 6 + 5 + 2 + 9 + 7 + 8 + 2 + 598 + 18 + 5 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 4661126980 + ... + 4661140988.

It is an arithmetic number, because the mean of its divisors is an integer number (233247334320).

Almost surely, 2^{65297825981856} 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 65297825981856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111958720473600).

65297825981856 is an abundant number, since it is smaller than the sum of its proper divisors (158619614965344).

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

65297825981856 is a wasteful number, since it uses less digits than its factorization.

65297825981856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14243 (or 14226 counting only the distinct ones).

The product of its digits is 5225472000, while the sum is 81.

The spelling of 65297825981856 in words is "sixty-five trillion, two hundred ninety-seven billion, eight hundred twenty-five million, nine hundred eighty-one thousand, eight hundred fifty-six".