65011678320 has 160 divisors (see below), whose sum is σ = 216146880000. Its totient is φ = 16114056192.

The previous prime is 65011678313. The next prime is 65011678321. The reversal of 65011678320 is 2387611056.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65011678321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 107181 + ... + 376179.

It is an arithmetic number, because the mean of its divisors is an integer number (1350918000).

Almost surely, 2^65011678320 is an apocalyptic number.

65011678320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65011678320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108073440000).

65011678320 is an abundant number, since it is smaller than the sum of its proper divisors (151135201680).

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

65011678320 is a wasteful number, since it uses less digits than its factorization.

65011678320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269087 (or 269081 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 39.

The spelling of 65011678320 in words is "sixty-five billion, eleven million, six hundred seventy-eight thousand, three hundred twenty".