209658131141 has 6 divisors (see below), whose sum is σ = 216890272710. Its totient is φ = 202426159656.

The previous prime is 209658131107. The next prime is 209658131153. The reversal of 209658131141 is 141131856902.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 180739768225 + 28918362916 = 425135^2 + 170054^2 .

It is a de Polignac number, because none of the positive numbers 2^k-209658131141 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 (209658131191) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2423270 + ... + 2508296.

It is an arithmetic number, because the mean of its divisors is an integer number (36148378785).

Almost surely, 2^209658131141 is an apocalyptic number.

It is an amenable number.

209658131141 is a deficient number, since it is larger than the sum of its proper divisors (7232141569).

209658131141 is an frugal number, since it uses more digits than its factorization.

209658131141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170083 (or 85056 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 41.

The spelling of 209658131141 in words is "two hundred nine billion, six hundred fifty-eight million, one hundred thirty-one thousand, one hundred forty-one".