209135697410 has 16 divisors (see below), whose sum is σ = 385198773696. Its totient is φ = 81708830448.

The previous prime is 209135697409. The next prime is 209135697481. The reversal of 209135697410 is 14796531902.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 243180614 + ... + 243181473.

It is an arithmetic number, because the mean of its divisors is an integer number (24074923356).

Almost surely, 2^209135697410 is an apocalyptic number.

209135697410 is a deficient number, since it is larger than the sum of its proper divisors (176063076286).

209135697410 is a wasteful number, since it uses less digits than its factorization.

209135697410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486362137.

The product of its (nonzero) digits is 408240, while the sum is 47.

The spelling of 209135697410 in words is "two hundred nine billion, one hundred thirty-five million, six hundred ninety-seven thousand, four hundred ten".