65433216840 has 96 divisors (see below), whose sum is σ = 201748942080. Its totient is φ = 16977224448.

The previous prime is 65433216839. The next prime is 65433216853. The reversal of 65433216840 is 4861233456.

It is a junction number, because it is equal to n+sod(n) for n = 65433216792 and 65433216801.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34872 + ... + 363431.

It is an arithmetic number, because the mean of its divisors is an integer number (2101551480).

Almost surely, 2^65433216840 is an apocalyptic number.

65433216840 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 65433216840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100874471040).

65433216840 is an abundant number, since it is smaller than the sum of its proper divisors (136315725240).

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

65433216840 is a wasteful number, since it uses less digits than its factorization.

65433216840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398391 (or 398350 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 42.

The spelling of 65433216840 in words is "sixty-five billion, four hundred thirty-three million, two hundred sixteen thousand, eight hundred forty".