1850385220087 has 2 divisors, whose sum is σ = 1850385220088. Its totient is φ = 1850385220086.

The previous prime is 1850385220081. The next prime is 1850385220097. The reversal of 1850385220087 is 7800225830581.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1850385220087 - 2²⁷ = 1850251002359 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1850385220087.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1850385220081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 925192610043 + 925192610044.

It is an arithmetic number, because the mean of its divisors is an integer number (925192610044).

Almost surely, 2^{1850385220087} is an apocalyptic number.

1850385220087 is a deficient number, since it is larger than the sum of its proper divisors (1).

1850385220087 is an equidigital number, since it uses as much as digits as its factorization.

1850385220087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1075200, while the sum is 49.

The spelling of 1850385220087 in words is "one trillion, eight hundred fifty billion, three hundred eighty-five million, two hundred twenty thousand, eighty-seven".