195989585390 has 64 divisors (see below), whose sum is σ = 374158407168. Its totient is φ = 73795276800.

The previous prime is 195989585279. The next prime is 195989585417. The reversal of 195989585390 is 93585989591.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4260392 + ... + 4306148.

It is an arithmetic number, because the mean of its divisors is an integer number (5846225112).

Almost surely, 2^195989585390 is an apocalyptic number.

195989585390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

195989585390 is a deficient number, since it is larger than the sum of its proper divisors (178168821778).

195989585390 is a wasteful number, since it uses less digits than its factorization.

195989585390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46173.

The product of its (nonzero) digits is 157464000, while the sum is 71.

The spelling of 195989585390 in words is "one hundred ninety-five billion, nine hundred eighty-nine million, five hundred eighty-five thousand, three hundred ninety".