261461217261364 has 24 divisors (see below), whose sum is σ = 462278836886720. Its totient is φ = 129381576535296.

The previous prime is 261461217261281. The next prime is 261461217261371. The reversal of 261461217261364 is 463162712164162.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36073807 + ... + 42711145.

Almost surely, 2^{261461217261364} is an apocalyptic number.

It is an amenable number.

261461217261364 is a deficient number, since it is larger than the sum of its proper divisors (200817619625356).

261461217261364 is a wasteful number, since it uses less digits than its factorization.

261461217261364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6738967 (or 6738965 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 52.

The spelling of 261461217261364 in words is "two hundred sixty-one trillion, four hundred sixty-one billion, two hundred seventeen million, two hundred sixty-one thousand, three hundred sixty-four".