65520000000000 has 1848 divisors, whose sum is σ = 291182220599088. Its totient is φ = 13824000000000.

The previous prime is 65519999999999. The next prime is 65520000000011. The reversal of 65520000000000 is 2556.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nialpdrome in base 10.

It is a Saint-Exupery number, since it is equal to the product of the sides of a Pythagorean triangle: 65000 × 63000 × 16000.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 131 ways as a sum of consecutive naturals, for example, 5039999999994 + ... + 5040000000006.

Almost surely, 2^{65520000000000} is an apocalyptic number.

65520000000000 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 65520000000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (145591110299544).

65520000000000 is an abundant number, since it is smaller than the sum of its proper divisors (225662220599088).

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

65520000000000 is an frugal number, since it uses more digits than its factorization.

65520000000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102 (or 30 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

Adding to 65520000000000 its reverse (2556), we get a palindrome (65520000002556).

The spelling of 65520000000000 in words is "sixty-five trillion, five hundred twenty billion", and thus it is an aban number.