261543073532203 has 16 divisors (see below), whose sum is σ = 274108966790400. Its totient is φ = 249076739656800.

The previous prime is 261543073532201. The next prime is 261543073532311. The reversal of 261543073532203 is 302235370345162.

It is a cyclic number.

It is not a de Polignac number, because 261543073532203 - 2¹ = 261543073532201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (261543073532201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 764908228 + ... + 765250078.

It is an arithmetic number, because the mean of its divisors is an integer number (17131810424400).

Almost surely, 2^{261543073532203} is an apocalyptic number.

261543073532203 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

261543073532203 is a deficient number, since it is larger than the sum of its proper divisors (12565893258197).

261543073532203 is a wasteful number, since it uses less digits than its factorization.

261543073532203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487362.

The product of its (nonzero) digits is 2721600, while the sum is 46.

The spelling of 261543073532203 in words is "two hundred sixty-one trillion, five hundred forty-three billion, seventy-three million, five hundred thirty-two thousand, two hundred three".