84720221265 has 16 divisors (see below), whose sum is σ = 135565041600. Its totient is φ = 45179888832.

The previous prime is 84720221221. The next prime is 84720221269. The reversal of 84720221265 is 56212202748.

It is not a de Polignac number, because 84720221265 - 2¹⁰ = 84720220241 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (84720221269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95235 + ... + 422504.

It is an arithmetic number, because the mean of its divisors is an integer number (8472815100).

Almost surely, 2^84720221265 is an apocalyptic number.

It is an amenable number.

84720221265 is a deficient number, since it is larger than the sum of its proper divisors (50844820335).

84720221265 is a wasteful number, since it uses less digits than its factorization.

84720221265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528656.

The product of its (nonzero) digits is 107520, while the sum is 39.

The spelling of 84720221265 in words is "eighty-four billion, seven hundred twenty million, two hundred twenty-one thousand, two hundred sixty-five".