261068243792 has 80 divisors (see below), whose sum is σ = 519304768320. Its totient is φ = 127101671424.

The previous prime is 261068243783. The next prime is 261068243819. The reversal of 261068243792 is 297342860162.

It is a self number, because there is not a number n which added to its sum of digits gives 261068243792.

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, 49943483 + ... + 49948709.

It is an arithmetic number, because the mean of its divisors is an integer number (6491309604).

Almost surely, 2^261068243792 is an apocalyptic number.

It is an amenable number.

261068243792 is a deficient number, since it is larger than the sum of its proper divisors (258236524528).

261068243792 is a wasteful number, since it uses less digits than its factorization.

261068243792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5788 (or 5782 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 50.

The spelling of 261068243792 in words is "two hundred sixty-one billion, sixty-eight million, two hundred forty-three thousand, seven hundred ninety-two".