65423303473440 has 768 divisors, whose sum is σ = 238620604078080. Its totient is φ = 14900610170880.

The previous prime is 65423303473439. The next prime is 65423303473469. The reversal of 65423303473440 is 4437430332456.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 65423303473440.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 18870290587 + ... + 18870294053.

It is an arithmetic number, because the mean of its divisors is an integer number (310703911560).

Almost surely, 2^{65423303473440} is an apocalyptic number.

65423303473440 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 65423303473440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119310302039040).

65423303473440 is an abundant number, since it is smaller than the sum of its proper divisors (173197300604640).

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

65423303473440 is a wasteful number, since it uses less digits than its factorization.

65423303473440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5025 (or 5017 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 48.

The spelling of 65423303473440 in words is "sixty-five trillion, four hundred twenty-three billion, three hundred three million, four hundred seventy-three thousand, four hundred forty".