855044713843220 has 12 divisors (see below), whose sum is σ = 1795593899070804. Its totient is φ = 342017885537280.

The previous prime is 855044713843171. The next prime is 855044713843319. The reversal of 855044713843220 is 22348317440558.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 382980359773456 + 472064354069764 = 19569884^2 + 21727042^2 .

It is a super-2 number, since 2×855044713843220² (a number of 31 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21376117846061 + ... + 21376117846100.

It is an arithmetic number, because the mean of its divisors is an integer number (149632824922567).

Almost surely, 2^{855044713843220} is an apocalyptic number.

It is an amenable number.

855044713843220 is an abundant number, since it is smaller than the sum of its proper divisors (940549185227584).

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

855044713843220 is a wasteful number, since it uses less digits than its factorization.

855044713843220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42752235692170 (or 42752235692168 counting only the distinct ones).

The product of its (nonzero) digits is 25804800, while the sum is 56.

The spelling of 855044713843220 in words is "eight hundred fifty-five trillion, forty-four billion, seven hundred thirteen million, eight hundred forty-three thousand, two hundred twenty".