1955806839029 has 2 divisors, whose sum is σ = 1955806839030. Its totient is φ = 1955806839028.

The previous prime is 1955806838933. The next prime is 1955806839067. The reversal of 1955806839029 is 9209386085591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1024552888804 + 931253950225 = 1012202^2 + 965015^2 .

It is an emirp because it is prime and its reverse (9209386085591) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1955806839029 - 2¹⁶ = 1955806773493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1955806839079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 977903419514 + 977903419515.

It is an arithmetic number, because the mean of its divisors is an integer number (977903419515).

Almost surely, 2^{1955806839029} is an apocalyptic number.

It is an amenable number.

1955806839029 is a deficient number, since it is larger than the sum of its proper divisors (1).

1955806839029 is an equidigital number, since it uses as much as digits as its factorization.

1955806839029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41990400, while the sum is 65.

The spelling of 1955806839029 in words is "one trillion, nine hundred fifty-five billion, eight hundred six million, eight hundred thirty-nine thousand, twenty-nine".