1958042211889 has 2 divisors, whose sum is σ = 1958042211890. Its totient is φ = 1958042211888.

The previous prime is 1958042211793. The next prime is 1958042211901. The reversal of 1958042211889 is 9881122408591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1797766092864 + 160276119025 = 1340808^2 + 400345^2 .

It is a cyclic number.

It is not a de Polignac number, because 1958042211889 - 2²⁵ = 1958008657457 is a prime.

It is not a weakly prime, because it can be changed into another prime (1958042215889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 979021105944 + 979021105945.

It is an arithmetic number, because the mean of its divisors is an integer number (979021105945).

Almost surely, 2^{1958042211889} is an apocalyptic number.

It is an amenable number.

1958042211889 is a deficient number, since it is larger than the sum of its proper divisors (1).

1958042211889 is an equidigital number, since it uses as much as digits as its factorization.

1958042211889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3317760, while the sum is 58.

The spelling of 1958042211889 in words is "one trillion, nine hundred fifty-eight billion, forty-two million, two hundred eleven thousand, eight hundred eighty-nine".