1955806838933 has 2 divisors, whose sum is σ = 1955806838934. Its totient is φ = 1955806838932.

The previous prime is 1955806838929. The next prime is 1955806839029. The reversal of 1955806838933 is 3398386085591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1845408137764 + 110398701169 = 1358458^2 + 332263^2 .

It is a cyclic number.

It is not a de Polignac number, because 1955806838933 - 2² = 1955806838929 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1955806838233) 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 as a sum of consecutive naturals, namely, 977903419466 + 977903419467.

It is an arithmetic number, because the mean of its divisors is an integer number (977903419467).

Almost surely, 2^{1955806838933} is an apocalyptic number.

It is an amenable number.

1955806838933 is a deficient number, since it is larger than the sum of its proper divisors (1).

1955806838933 is an equidigital number, since it uses as much as digits as its factorization.

1955806838933 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 167961600, while the sum is 68.

The spelling of 1955806838933 in words is "one trillion, nine hundred fifty-five billion, eight hundred six million, eight hundred thirty-eight thousand, nine hundred thirty-three".