8139820326901 has 2 divisors, whose sum is σ = 8139820326902. Its totient is φ = 8139820326900.

The previous prime is 8139820326899. The next prime is 8139820326917. The reversal of 8139820326901 is 1096230289318.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7155357502500 + 984462824401 = 2674950^2 + 992201^2 .

It is a cyclic number.

It is not a de Polignac number, because 8139820326901 - 2¹ = 8139820326899 is a prime.

Together with 8139820326899, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8139820326991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4069910163450 + 4069910163451.

It is an arithmetic number, because the mean of its divisors is an integer number (4069910163451).

Almost surely, 2^{8139820326901} is an apocalyptic number.

It is an amenable number.

8139820326901 is a deficient number, since it is larger than the sum of its proper divisors (1).

8139820326901 is an equidigital number, since it uses as much as digits as its factorization.

8139820326901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1119744, while the sum is 52.

The spelling of 8139820326901 in words is "eight trillion, one hundred thirty-nine billion, eight hundred twenty million, three hundred twenty-six thousand, nine hundred one".