1985406383195 has 16 divisors (see below), whose sum is σ = 2431333432800. Its totient is φ = 1556053311744.

The previous prime is 1985406383189. The next prime is 1985406383221. The reversal of 1985406383195 is 5913836045891.

It is a cyclic number.

It is not a de Polignac number, because 1985406383195 - 2⁴ = 1985406383179 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18198869 + ... + 18307638.

It is an arithmetic number, because the mean of its divisors is an integer number (151958339550).

Almost surely, 2^{1985406383195} is an apocalyptic number.

1985406383195 is a deficient number, since it is larger than the sum of its proper divisors (445927049605).

1985406383195 is a wasteful number, since it uses less digits than its factorization.

1985406383195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36506734.

The product of its (nonzero) digits is 27993600, while the sum is 62.

The spelling of 1985406383195 in words is "one trillion, nine hundred eighty-five billion, four hundred six million, three hundred eighty-three thousand, one hundred ninety-five".