261208060828 has 24 divisors (see below), whose sum is σ = 537029161200. Its totient is φ = 109597787520.

The previous prime is 261208060783. The next prime is 261208060847. The reversal of 261208060828 is 828060802162.

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, 228328153 + ... + 228329296.

It is an arithmetic number, because the mean of its divisors is an integer number (22376215050).

Almost surely, 2^261208060828 is an apocalyptic number.

It is an amenable number.

261208060828 is an abundant number, since it is smaller than the sum of its proper divisors (275821100372).

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

261208060828 is a wasteful number, since it uses less digits than its factorization.

261208060828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456657477 (or 456657475 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 43.

The spelling of 261208060828 in words is "two hundred sixty-one billion, two hundred eight million, sixty thousand, eight hundred twenty-eight".