320953418185 has 4 divisors (see below), whose sum is σ = 385144101828. Its totient is φ = 256762734544.

The previous prime is 320953418147. The next prime is 320953418197. The reversal of 320953418185 is 581814359023.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 65486857216 + 255466560969 = 255904^2 + 505437^2 .

It is a cyclic number.

It is not a de Polignac number, because 320953418185 - 2¹¹ = 320953416137 is a prime.

It is a super-2 number, since 2×320953418185² (a number of 24 digits) contains 22 as substring.

It is a Duffinian 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, 32095341814 + ... + 32095341823.

It is an arithmetic number, because the mean of its divisors is an integer number (96286025457).

Almost surely, 2^320953418185 is an apocalyptic number.

It is an amenable number.

320953418185 is a deficient number, since it is larger than the sum of its proper divisors (64190683643).

320953418185 is an equidigital number, since it uses as much as digits as its factorization.

320953418185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64190683642.

The product of its (nonzero) digits is 1036800, while the sum is 49.

The spelling of 320953418185 in words is "three hundred twenty billion, nine hundred fifty-three million, four hundred eighteen thousand, one hundred eighty-five".