65375723520 has 336 divisors, whose sum is σ = 228841675920. Its totient is φ = 17262968832.

The previous prime is 65375723473. The next prime is 65375723521. The reversal of 65375723520 is 2532757356.

65375723520 is a `hidden beast` number, since 6 + 53 + 7 + 5 + 72 + 3 + 520 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65375723521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40180947 + ... + 40182573.

Almost surely, 2^65375723520 is an apocalyptic number.

65375723520 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 65375723520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114420837960).

65375723520 is an abundant number, since it is smaller than the sum of its proper divisors (163465952400).

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

65375723520 is a wasteful number, since it uses less digits than its factorization.

65375723520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1773 (or 1746 counting only the distinct ones).

The product of its (nonzero) digits is 1323000, while the sum is 45.

The spelling of 65375723520 in words is "sixty-five billion, three hundred seventy-five million, seven hundred twenty-three thousand, five hundred twenty".