261054066747872 has 48 divisors (see below), whose sum is σ = 520951098528000. Its totient is φ = 128752170019200.

The previous prime is 261054066747869. The next prime is 261054066747889. The reversal of 261054066747872 is 278747660450162.

It is a junction number, because it is equal to n+sod(n) for n = 261054066747799 and 261054066747808.

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, 46470122 + ... + 51783977.

It is an arithmetic number, because the mean of its divisors is an integer number (10853147886000).

Almost surely, 2^{261054066747872} is an apocalyptic number.

It is an amenable number.

261054066747872 is a deficient number, since it is larger than the sum of its proper divisors (259897031780128).

261054066747872 is a wasteful number, since it uses less digits than its factorization.

261054066747872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98255239 (or 98255231 counting only the distinct ones).

The product of its (nonzero) digits is 189665280, while the sum is 65.

The spelling of 261054066747872 in words is "two hundred sixty-one trillion, fifty-four billion, sixty-six million, seven hundred forty-seven thousand, eight hundred seventy-two".