320123156202401 has 4 divisors (see below), whose sum is σ = 322956104487492. Its totient is φ = 317290207917312.

The previous prime is 320123156202389. The next prime is 320123156202407. The reversal of 320123156202401 is 104202651321023.

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 79381399821376 + 240741756381025 = 8909624^2 + 15515855^2 .

It is a cyclic number.

It is not a de Polignac number, because 320123156202401 - 2¹⁴ = 320123156186017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320123156202407) 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, 1416474142376 + ... + 1416474142601.

It is an arithmetic number, because the mean of its divisors is an integer number (80739026121873).

Almost surely, 2^{320123156202401} is an apocalyptic number.

It is an amenable number.

320123156202401 is a deficient number, since it is larger than the sum of its proper divisors (2832948285091).

320123156202401 is a wasteful number, since it uses less digits than its factorization.

320123156202401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2832948285090.

The product of its (nonzero) digits is 17280, while the sum is 32.

The spelling of 320123156202401 in words is "three hundred twenty trillion, one hundred twenty-three billion, one hundred fifty-six million, two hundred two thousand, four hundred one".