261161185276 has 6 divisors (see below), whose sum is σ = 457032074240. Its totient is φ = 130580592636.

The previous prime is 261161185273. The next prime is 261161185303. The reversal of 261161185276 is 672581161162.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261161185273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32645148156 + ... + 32645148163.

Almost surely, 2^261161185276 is an apocalyptic number.

It is an amenable number.

261161185276 is a deficient number, since it is larger than the sum of its proper divisors (195870888964).

261161185276 is a wasteful number, since it uses less digits than its factorization.

261161185276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65290296323 (or 65290296321 counting only the distinct ones).

The product of its digits is 241920, while the sum is 46.

The spelling of 261161185276 in words is "two hundred sixty-one billion, one hundred sixty-one million, one hundred eighty-five thousand, two hundred seventy-six".