261484136271 has 6 divisors (see below), whose sum is σ = 377699307960. Its totient is φ = 174322757508.

The previous prime is 261484136239. The next prime is 261484136281. The reversal of 261484136271 is 172631484162.

261484136271 is a `hidden beast` number, since 2 + 6 + 1 + 4 + 8 + 4 + 13 + 627 + 1 = 666.

It is not a de Polignac number, because 261484136271 - 2⁵ = 261484136239 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261484136281) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14526896451 + ... + 14526896468.

It is an arithmetic number, because the mean of its divisors is an integer number (62949884660).

Almost surely, 2^261484136271 is an apocalyptic number.

261484136271 is a deficient number, since it is larger than the sum of its proper divisors (116215171689).

261484136271 is a wasteful number, since it uses less digits than its factorization.

261484136271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29053792925 (or 29053792922 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The spelling of 261484136271 in words is "two hundred sixty-one billion, four hundred eighty-four million, one hundred thirty-six thousand, two hundred seventy-one".