261062561121853 has 32 divisors (see below), whose sum is σ = 281366928944640. Its totient is φ = 241421754087360.

The previous prime is 261062561121751. The next prime is 261062561121883. The reversal of 261062561121853 is 358121165260162.

It is a cyclic number.

It is not a de Polignac number, because 261062561121853 - 2⁴¹ = 258863537866301 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 261062561121797 and 261062561121806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261062561121883) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16411795726 + ... + 16411811632.

It is an arithmetic number, because the mean of its divisors is an integer number (8792716529520).

Almost surely, 2^{261062561121853} is an apocalyptic number.

It is an amenable number.

261062561121853 is a deficient number, since it is larger than the sum of its proper divisors (20304367822787).

261062561121853 is a wasteful number, since it uses less digits than its factorization.

261062561121853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27097.

The product of its (nonzero) digits is 1036800, while the sum is 49.

The spelling of 261062561121853 in words is "two hundred sixty-one trillion, sixty-two billion, five hundred sixty-one million, one hundred twenty-one thousand, eight hundred fifty-three".