261646200544215 has 64 divisors (see below), whose sum is σ = 424090837900800. Its totient is φ = 137731300608000.

The previous prime is 261646200544159. The next prime is 261646200544231. The reversal of 261646200544215 is 512445002646162.

It is not a de Polignac number, because 261646200544215 - 2⁶ = 261646200544151 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10984756576 + ... + 10984780394.

It is an arithmetic number, because the mean of its divisors is an integer number (6626419342200).

Almost surely, 2^{261646200544215} is an apocalyptic number.

261646200544215 is a deficient number, since it is larger than the sum of its proper divisors (162444637356585).

261646200544215 is a wasteful number, since it uses less digits than its factorization.

261646200544215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38208.

The product of its (nonzero) digits is 2764800, while the sum is 48.

The spelling of 261646200544215 in words is "two hundred sixty-one trillion, six hundred forty-six billion, two hundred million, five hundred forty-four thousand, two hundred fifteen".