320518025871 has 4 divisors (see below), whose sum is σ = 427357367832. Its totient is φ = 213678683912.

The previous prime is 320518025869. The next prime is 320518025873. The reversal of 320518025871 is 178520815023.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (320518025869) and next prime (320518025873).

It is a cyclic number.

It is not a de Polignac number, because 320518025871 - 2¹ = 320518025869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320518025873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53419670976 + ... + 53419670981.

It is an arithmetic number, because the mean of its divisors is an integer number (106839341958).

Almost surely, 2^320518025871 is an apocalyptic number.

320518025871 is a deficient number, since it is larger than the sum of its proper divisors (106839341961).

320518025871 is a wasteful number, since it uses less digits than its factorization.

320518025871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106839341960.

The product of its (nonzero) digits is 134400, while the sum is 42.

The spelling of 320518025871 in words is "three hundred twenty billion, five hundred eighteen million, twenty-five thousand, eight hundred seventy-one".