1854431140207 has 2 divisors, whose sum is σ = 1854431140208. Its totient is φ = 1854431140206.

The previous prime is 1854431140193. The next prime is 1854431140319. The reversal of 1854431140207 is 7020411344581.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1854431140207 - 2¹⁵ = 1854431107439 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1854431140207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1854431140607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 927215570103 + 927215570104.

It is an arithmetic number, because the mean of its divisors is an integer number (927215570104).

Almost surely, 2^{1854431140207} is an apocalyptic number.

1854431140207 is a deficient number, since it is larger than the sum of its proper divisors (1).

1854431140207 is an equidigital number, since it uses as much as digits as its factorization.

1854431140207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 107520, while the sum is 40.

Adding to 1854431140207 its reverse (7020411344581), we get a palindrome (8874842484788).

The spelling of 1854431140207 in words is "one trillion, eight hundred fifty-four billion, four hundred thirty-one million, one hundred forty thousand, two hundred seven".