320504179861 has 2 divisors, whose sum is σ = 320504179862. Its totient is φ = 320504179860.

The previous prime is 320504179837. The next prime is 320504179871. The reversal of 320504179861 is 168971405023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 297372811761 + 23131368100 = 545319^2 + 152090^2 .

It is a cyclic number.

It is not a de Polignac number, because 320504179861 - 2⁷ = 320504179733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320504179871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160252089930 + 160252089931.

It is an arithmetic number, because the mean of its divisors is an integer number (160252089931).

It is a 2-persistent number, because it is pandigital, and so is 2⋅320504179861 = 641008359722, but 3⋅320504179861 = 961512539583 is not.

Almost surely, 2^320504179861 is an apocalyptic number.

It is an amenable number.

320504179861 is a deficient number, since it is larger than the sum of its proper divisors (1).

320504179861 is an equidigital number, since it uses as much as digits as its factorization.

320504179861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 46.

The spelling of 320504179861 in words is "three hundred twenty billion, five hundred four million, one hundred seventy-nine thousand, eight hundred sixty-one".