65494608816 has 480 divisors, whose sum is σ = 223242933760. Its totient is φ = 16204271616.

The previous prime is 65494608797. The next prime is 65494608887. The reversal of 65494608816 is 61880649456.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 213337335 + ... + 213337641.

Almost surely, 2^65494608816 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 65494608816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111621466880).

65494608816 is an abundant number, since it is smaller than the sum of its proper divisors (157748324944).

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

65494608816 is a wasteful number, since it uses less digits than its factorization.

65494608816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398 (or 349 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 57.

The spelling of 65494608816 in words is "sixty-five billion, four hundred ninety-four million, six hundred eight thousand, eight hundred sixteen".