209085910534 has 4 divisors (see below), whose sum is σ = 313628865804. Its totient is φ = 104542955266.

The previous prime is 209085910499. The next prime is 209085910573. The reversal of 209085910534 is 435019580902.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52271477632 + ... + 52271477635.

It is an arithmetic number, because the mean of its divisors is an integer number (78407216451).

Almost surely, 2^209085910534 is an apocalyptic number.

209085910534 is a deficient number, since it is larger than the sum of its proper divisors (104542955270).

209085910534 is a wasteful number, since it uses less digits than its factorization.

209085910534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104542955269.

The product of its (nonzero) digits is 388800, while the sum is 46.

The spelling of 209085910534 in words is "two hundred nine billion, eighty-five million, nine hundred ten thousand, five hundred thirty-four".