320011117581 has 16 divisors (see below), whose sum is σ = 449644838400. Its totient is φ = 201884392368.

The previous prime is 320011117577. The next prime is 320011117583. The reversal of 320011117581 is 185711110023.

It is not a de Polignac number, because 320011117581 - 2² = 320011117577 is a prime.

It is a super-2 number, since 2×320011117581² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320011117583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3114171 + ... + 3215288.

It is an arithmetic number, because the mean of its divisors is an integer number (28102802400).

Almost surely, 2^320011117581 is an apocalyptic number.

It is an amenable number.

320011117581 is a deficient number, since it is larger than the sum of its proper divisors (129633720819).

320011117581 is a wasteful number, since it uses less digits than its factorization.

320011117581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6330368.

The product of its (nonzero) digits is 1680, while the sum is 30.

The spelling of 320011117581 in words is "three hundred twenty billion, eleven million, one hundred seventeen thousand, five hundred eighty-one".