65525525280 has 144 divisors (see below), whose sum is σ = 226300314240. Its totient is φ = 17262918144.

The previous prime is 65525525249. The next prime is 65525525327. The reversal of 65525525280 is 8252552556.

65525525280 is a `hidden beast` number, since 6 + 55 + 25 + 52 + 528 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

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

It is an unprimeable number.

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, 154600 + ... + 393639.

It is an arithmetic number, because the mean of its divisors is an integer number (1571529960).

Almost surely, 2^65525525280 is an apocalyptic number.

65525525280 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65525525280 is an abundant number, since it is smaller than the sum of its proper divisors (160774788960).

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

65525525280 is a wasteful number, since it uses less digits than its factorization.

65525525280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548343 (or 548332 counting only the distinct ones).

The product of its (nonzero) digits is 1200000, while the sum is 45.

The spelling of 65525525280 in words is "sixty-five billion, five hundred twenty-five million, five hundred twenty-five thousand, two hundred eighty".