1985523735195 has 432 divisors, whose sum is σ = 5007577959072. Its totient is φ = 716849602560.

The previous prime is 1985523735119. The next prime is 1985523735227. The reversal of 1985523735195 is 5915373255891.

1985523735195 is a `hidden beast` number, since 1 + 9 + 8 + 552 + 3 + 73 + 5 + 1 + 9 + 5 = 666.

It is not a de Polignac number, because 1985523735195 - 2¹³ = 1985523727003 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 431 ways as a sum of consecutive naturals, for example, 69670369 + ... + 69698861.

It is an arithmetic number, because the mean of its divisors is an integer number (11591615646).

Almost surely, 2^{1985523735195} is an apocalyptic number.

1985523735195 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1985523735195 is an abundant number, since it is smaller than the sum of its proper divisors (3022054223877).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1985523735195 is a wasteful number, since it uses less digits than its factorization.

1985523735195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28572 (or 28549 counting only the distinct ones).

The product of its digits is 51030000, while the sum is 63.

The spelling of 1985523735195 in words is "one trillion, nine hundred eighty-five billion, five hundred twenty-three million, seven hundred thirty-five thousand, one hundred ninety-five".