261646065177116 has 48 divisors (see below), whose sum is σ = 470067426419136. Its totient is φ = 127400635275264.

The previous prime is 261646065177113. The next prime is 261646065177121. The reversal of 261646065177116 is 611771560646162.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261646065177113) 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, 14576111 + ... + 27124806.

It is an arithmetic number, because the mean of its divisors is an integer number (9793071383732).

Almost surely, 2^{261646065177116} is an apocalyptic number.

It is an amenable number.

261646065177116 is a deficient number, since it is larger than the sum of its proper divisors (208421361242020).

261646065177116 is a wasteful number, since it uses less digits than its factorization.

261646065177116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41701278 (or 41701276 counting only the distinct ones).

The product of its (nonzero) digits is 15240960, while the sum is 59.

The spelling of 261646065177116 in words is "two hundred sixty-one trillion, six hundred forty-six billion, sixty-five million, one hundred seventy-seven thousand, one hundred sixteen".