320700367955881 has 9 divisors (see below), whose sum is σ = 332140871380773. Its totient is φ = 309641233151040.

The previous prime is 320700367955867. The next prime is 320700367955897. The reversal of 320700367955881 is 188559763007023.

The square root of 320700367955881 is 17908109.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 138841657705881 + 181858710250000 = 11783109^2 + 13485500^2 .

It is not a de Polignac number, because 320700367955881 - 2¹³ = 320700367947689 is a prime.

It is a super-2 number, since 2×320700367955881² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320700367950881) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 519026401 + ... + 519643921.

Almost surely, 2^{320700367955881} is an apocalyptic number.

320700367955881 is the 17908109-th square number.

320700367955881 is the 8954055-th centered octagonal number.

It is an amenable number.

320700367955881 is a deficient number, since it is larger than the sum of its proper divisors (11440503424892).

320700367955881 is an frugal number, since it uses more digits than its factorization.

320700367955881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1235100 (or 617550 counting only the distinct ones).

The product of its (nonzero) digits is 76204800, while the sum is 64.

The spelling of 320700367955881 in words is "three hundred twenty trillion, seven hundred billion, three hundred sixty-seven million, nine hundred fifty-five thousand, eight hundred eighty-one".