320042543401 has 4 divisors (see below), whose sum is σ = 365762906752. Its totient is φ = 274322180052.

The previous prime is 320042543351. The next prime is 320042543411. The reversal of 320042543401 is 104345240023.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 104345240023 = 8317 ⋅12546019.

It is a cyclic number.

It is not a de Polignac number, because 320042543401 - 2¹⁵ = 320042510633 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 320042543401.

It is not an unprimeable number, because it can be changed into a prime (320042543411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22860181665 + ... + 22860181678.

It is an arithmetic number, because the mean of its divisors is an integer number (91440726688).

Almost surely, 2^320042543401 is an apocalyptic number.

It is an amenable number.

320042543401 is a deficient number, since it is larger than the sum of its proper divisors (45720363351).

320042543401 is an equidigital number, since it uses as much as digits as its factorization.

320042543401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45720363350.

The product of its (nonzero) digits is 11520, while the sum is 28.

Adding to 320042543401 its reverse (104345240023), we get a palindrome (424387783424).

The spelling of 320042543401 in words is "three hundred twenty billion, forty-two million, five hundred forty-three thousand, four hundred one".