65398826784480 has 768 divisors, whose sum is σ = 246480194709504. Its totient is φ = 14265416908800.

The previous prime is 65398826784419. The next prime is 65398826784493. The reversal of 65398826784480 is 8448762889356.

It is a junction number, because it is equal to n+sod(n) for n = 65398826784396 and 65398826784405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1343501902 + ... + 1343550578.

It is an arithmetic number, because the mean of its divisors is an integer number (320937753528).

Almost surely, 2^{65398826784480} is an apocalyptic number.

65398826784480 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 65398826784480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123240097354752).

65398826784480 is an abundant number, since it is smaller than the sum of its proper divisors (181081367925024).

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

65398826784480 is a wasteful number, since it uses less digits than its factorization.

65398826784480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48947 (or 48939 counting only the distinct ones).

The product of its (nonzero) digits is 4459069440, while the sum is 78.

The spelling of 65398826784480 in words is "sixty-five trillion, three hundred ninety-eight billion, eight hundred twenty-six million, seven hundred eighty-four thousand, four hundred eighty".