65520002556 has 72 divisors (see below), whose sum is σ = 168324156000. Its totient is φ = 21485882880.

The previous prime is 65520002491. The next prime is 65520002567.

65520002556 is a `hidden beast` number, since 65 + 520 + 0 + 0 + 25 + 56 = 666.

65520002556 is nontrivially palindromic in base 10.

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

It is a self number, because there is not a number n which added to its sum of digits gives 65520002556.

It is a congruent number.

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, 586216 + ... + 688976.

It is an arithmetic number, because the mean of its divisors is an integer number (2337835500).

Almost surely, 2^65520002556 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65520002556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84162078000).

65520002556 is an abundant number, since it is smaller than the sum of its proper divisors (102804153444).

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

65520002556 is a wasteful number, since it uses less digits than its factorization.

65520002556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103059 (or 103054 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 36.

It can be divided in two parts, 6552000 and 2556, that added together give a palindrome (6554556).

The spelling of 65520002556 in words is "sixty-five billion, five hundred twenty million, two thousand, five hundred fifty-six".