261655476143211 has 48 divisors (see below), whose sum is σ = 388280799178272. Its totient is φ = 169726752000000.

The previous prime is 261655476143197. The next prime is 261655476143213. The reversal of 261655476143211 is 112341674556162.

261655476143211 is a `hidden beast` number, since 2 + 6 + 1 + 6 + 5 + 5 + 4 + 7 + 614 + 3 + 2 + 11 = 666.

It is not a de Polignac number, because 261655476143211 - 2³⁰ = 261654402401387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (261655476143213) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 32193211 + ... + 39493211.

It is an arithmetic number, because the mean of its divisors is an integer number (8089183316214).

Almost surely, 2^{261655476143211} is an apocalyptic number.

261655476143211 is a deficient number, since it is larger than the sum of its proper divisors (126625323035061).

261655476143211 is a wasteful number, since it uses less digits than its factorization.

261655476143211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7300684 (or 7300681 counting only the distinct ones).

The product of its digits is 7257600, while the sum is 54.

The spelling of 261655476143211 in words is "two hundred sixty-one trillion, six hundred fifty-five billion, four hundred seventy-six million, one hundred forty-three thousand, two hundred eleven".