1954109203199 has 2 divisors, whose sum is σ = 1954109203200. Its totient is φ = 1954109203198.

The previous prime is 1954109203147. The next prime is 1954109203223. The reversal of 1954109203199 is 9913029014591.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1954109203199 - 2¹⁶ = 1954109137663 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1954109203199.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1954102203199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 977054601599 + 977054601600.

It is an arithmetic number, because the mean of its divisors is an integer number (977054601600).

Almost surely, 2^{1954109203199} is an apocalyptic number.

1954109203199 is a deficient number, since it is larger than the sum of its proper divisors (1).

1954109203199 is an equidigital number, since it uses as much as digits as its factorization.

1954109203199 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 787320, while the sum is 53.

The spelling of 1954109203199 in words is "one trillion, nine hundred fifty-four billion, one hundred nine million, two hundred three thousand, one hundred ninety-nine".