9865464044220 has 72 divisors (see below), whose sum is σ = 30890571304320. Its totient is φ = 2545926203520.

The previous prime is 9865464044207. The next prime is 9865464044231. The reversal of 9865464044220 is 224404645689.

9865464044220 is a `hidden beast` number, since 9 + 8 + 6 + 5 + 4 + 6 + 404 + 4 + 220 = 666.

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, 883996575 + ... + 884007734.

It is an arithmetic number, because the mean of its divisors is an integer number (429035712560).

Almost surely, 2^{9865464044220} is an apocalyptic number.

9865464044220 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

9865464044220 is an abundant number, since it is smaller than the sum of its proper divisors (21025107260100).

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

9865464044220 is a wasteful number, since it uses less digits than its factorization.

9865464044220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1768004355 (or 1768004350 counting only the distinct ones).

The product of its (nonzero) digits is 13271040, while the sum is 54.

The spelling of 9865464044220 in words is "nine trillion, eight hundred sixty-five billion, four hundred sixty-four million, forty-four thousand, two hundred twenty".