209746835533693 has 8 divisors (see below), whose sum is σ = 210157146262368. Its totient is φ = 209336746780944.

The previous prime is 209746835533681. The next prime is 209746835533787. The reversal of 209746835533693 is 396335538647902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 209746835533693 - 2⁴¹ = 207547812278141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209746835537693) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53602255 + ... + 57382012.

It is an arithmetic number, because the mean of its divisors is an integer number (26269643282796).

Almost surely, 2^{209746835533693} is an apocalyptic number.

It is an amenable number.

209746835533693 is a deficient number, since it is larger than the sum of its proper divisors (410310728675).

209746835533693 is a wasteful number, since it uses less digits than its factorization.

209746835533693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110987963.

The product of its (nonzero) digits is 2645395200, while the sum is 73.

The spelling of 209746835533693 in words is "two hundred nine trillion, seven hundred forty-six billion, eight hundred thirty-five million, five hundred thirty-three thousand, six hundred ninety-three".