261656272742514 has 32 divisors (see below), whose sum is σ = 596718377660160. Its totient is φ = 75773762241792.

The previous prime is 261656272742483. The next prime is 261656272742519. The reversal of 261656272742514 is 415247272656162.

It is not an unprimeable number, because it can be changed into a prime (261656272742519) 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, 98663751594 + ... + 98663754245.

It is an arithmetic number, because the mean of its divisors is an integer number (18647449301880).

Almost surely, 2^{261656272742514} is an apocalyptic number.

261656272742514 is an abundant number, since it is smaller than the sum of its proper divisors (335062104917646).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261656272742514 is a wasteful number, since it uses less digits than its factorization.

261656272742514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197327505874.

The product of its digits is 67737600, while the sum is 60.

The spelling of 261656272742514 in words is "two hundred sixty-one trillion, six hundred fifty-six billion, two hundred seventy-two million, seven hundred forty-two thousand, five hundred fourteen".