261760536221001 has 16 divisors (see below), whose sum is σ = 349272197923584. Its totient is φ = 174377982732624.

The previous prime is 261760536220993. The next prime is 261760536221039. The reversal of 261760536221001 is 100122635067162.

It is not a de Polignac number, because 261760536221001 - 2³ = 261760536220993 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (261760536222001) 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, 27206766 + ... + 35548968.

It is an arithmetic number, because the mean of its divisors is an integer number (21829512370224).

Almost surely, 2^{261760536221001} is an apocalyptic number.

It is an amenable number.

261760536221001 is a deficient number, since it is larger than the sum of its proper divisors (87511661702583).

261760536221001 is a wasteful number, since it uses less digits than its factorization.

261760536221001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8349940.

The product of its (nonzero) digits is 181440, while the sum is 42.

The spelling of 261760536221001 in words is "two hundred sixty-one trillion, seven hundred sixty billion, five hundred thirty-six million, two hundred twenty-one thousand, one".