209401088841 has 96 divisors (see below), whose sum is σ = 396382924800. Its totient is φ = 108430993440.

The previous prime is 209401088801. The next prime is 209401088843. The reversal of 209401088841 is 148880104902.

It is not a de Polignac number, because 209401088841 - 2⁹ = 209401088329 is a prime.

It is not an unprimeable number, because it can be changed into a prime (209401088843) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 397056 + ... + 759246.

It is an arithmetic number, because the mean of its divisors is an integer number (4128988800).

Almost surely, 2^209401088841 is an apocalyptic number.

209401088841 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

209401088841 is a deficient number, since it is larger than the sum of its proper divisors (186981835959).

209401088841 is a wasteful number, since it uses less digits than its factorization.

209401088841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362256 (or 362243 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 45.

The spelling of 209401088841 in words is "two hundred nine billion, four hundred one million, eighty-eight thousand, eight hundred forty-one".