261251504640214 has 32 divisors (see below), whose sum is σ = 441548602481952. Its totient is φ = 115854325734400.

The previous prime is 261251504640179. The next prime is 261251504640281. The reversal of 261251504640214 is 412046405152162.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1196733067 + ... + 1196951350.

It is an arithmetic number, because the mean of its divisors is an integer number (13798393827561).

Almost surely, 2^{261251504640214} is an apocalyptic number.

261251504640214 is a deficient number, since it is larger than the sum of its proper divisors (180297097841738).

261251504640214 is a wasteful number, since it uses less digits than its factorization.

261251504640214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2393684493 (or 2393684471 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 43.

Adding to 261251504640214 its reverse (412046405152162), we get a palindrome (673297909792376).

The spelling of 261251504640214 in words is "two hundred sixty-one trillion, two hundred fifty-one billion, five hundred four million, six hundred forty thousand, two hundred fourteen".