261440114565541 has 8 divisors (see below), whose sum is σ = 270455565967200. Its totient is φ = 252424681499760.

The previous prime is 261440114565533. The next prime is 261440114565563. The reversal of 261440114565541 is 145565411044162.

It is a happy number.

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 261440114565541 - 2³ = 261440114565533 is a prime.

It is a super-3 number, since 3×261440114565541³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261440114569541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28462506 + ... + 36510196.

It is an arithmetic number, because the mean of its divisors is an integer number (33806945745900).

Almost surely, 2^{261440114565541} is an apocalyptic number.

It is an amenable number.

261440114565541 is a deficient number, since it is larger than the sum of its proper divisors (9015451401659).

261440114565541 is a wasteful number, since it uses less digits than its factorization.

261440114565541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9167939.

The product of its (nonzero) digits is 2304000, while the sum is 49.

The spelling of 261440114565541 in words is "two hundred sixty-one trillion, four hundred forty billion, one hundred fourteen million, five hundred sixty-five thousand, five hundred forty-one".