65585520000 has 2160 divisors, whose sum is σ = 324072185580. Its totient is φ = 12579840000.

The previous prime is 65585519983. The next prime is 65585520023. The reversal of 65585520000 is 2558556.

65585520000 is a `hidden beast` number, since 6 + 55 + 85 + 520 + 0 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 269 ways as a sum of consecutive naturals, for example, 5045039994 + ... + 5045040006.

Almost surely, 2^65585520000 is an apocalyptic number.

65585520000 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 65585520000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (162036092790).

65585520000 is an abundant number, since it is smaller than the sum of its proper divisors (258486665580).

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

65585520000 is a wasteful number, since it uses less digits than its factorization.

65585520000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91 (or 41 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 36.

It can be divided in two parts, 65585 and 520000, that added together give a palindrome (585585).

The spelling of 65585520000 in words is "sixty-five billion, five hundred eighty-five million, five hundred twenty thousand".