320400149539 has 2 divisors, whose sum is σ = 320400149540. Its totient is φ = 320400149538.

The previous prime is 320400149519. The next prime is 320400149579. The reversal of 320400149539 is 935941004023.

It is an a-pointer prime, because the next prime (320400149579) can be obtained adding 320400149539 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 320400149539 - 2¹¹ = 320400147491 is a prime.

It is a super-2 number, since 2×320400149539² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (320400149519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160200074769 + 160200074770.

It is an arithmetic number, because the mean of its divisors is an integer number (160200074770).

Almost surely, 2^320400149539 is an apocalyptic number.

320400149539 is a deficient number, since it is larger than the sum of its proper divisors (1).

320400149539 is an equidigital number, since it uses as much as digits as its factorization.

320400149539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 116640, while the sum is 40.

The spelling of 320400149539 in words is "three hundred twenty billion, four hundred million, one hundred forty-nine thousand, five hundred thirty-nine".