261506413411 has 16 divisors (see below), whose sum is σ = 269300753568. Its totient is φ = 253751270400.

The previous prime is 261506413397. The next prime is 261506413423. The reversal of 261506413411 is 114314605162.

It is a cyclic number.

It is not a de Polignac number, because 261506413411 - 2¹⁹ = 261505889123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261506413211) 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, 22381491 + ... + 22393171.

It is an arithmetic number, because the mean of its divisors is an integer number (16831297098).

Almost surely, 2^261506413411 is an apocalyptic number.

261506413411 is a deficient number, since it is larger than the sum of its proper divisors (7794340157).

261506413411 is a wasteful number, since it uses less digits than its factorization.

261506413411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13302.

The product of its (nonzero) digits is 17280, while the sum is 34.

The spelling of 261506413411 in words is "two hundred sixty-one billion, five hundred six million, four hundred thirteen thousand, four hundred eleven".