320111343440 has 60 divisors (see below), whose sum is σ = 865770536916. Its totient is φ = 109752459264.

The previous prime is 320111343437. The next prime is 320111343443. The reversal of 320111343440 is 44343111023.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (320111343437) and next prime (320111343443).

It can be written as a sum of positive squares in 2 ways, for example, as 75019018816 + 245092324624 = 273896^2 + 495068^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320111343443) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40826609 + ... + 40834448.

Almost surely, 2^320111343440 is an apocalyptic number.

It is an amenable number.

320111343440 is an abundant number, since it is smaller than the sum of its proper divisors (545659193476).

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

320111343440 is a wasteful number, since it uses less digits than its factorization.

320111343440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81661084 (or 81661071 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 320111343440 its reverse (44343111023), we get a palindrome (364454454463).

The spelling of 320111343440 in words is "three hundred twenty billion, one hundred eleven million, three hundred forty-three thousand, four hundred forty".