261847541554116 has 48 divisors (see below), whose sum is σ = 698297983595520. Its totient is φ = 74809525502880.

The previous prime is 261847541554111. The next prime is 261847541554127. The reversal of 261847541554116 is 611455145748162.

It is a self number, because there is not a number n which added to its sum of digits gives 261847541554116.

It is not an unprimeable number, because it can be changed into a prime (261847541554111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82979370 + ... + 86077121.

It is an arithmetic number, because the mean of its divisors is an integer number (14547874658240).

Almost surely, 2^{261847541554116} is an apocalyptic number.

It is an amenable number.

261847541554116 is an abundant number, since it is smaller than the sum of its proper divisors (436450442041404).

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

261847541554116 is a wasteful number, since it uses less digits than its factorization.

261847541554116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169074944 (or 169074942 counting only the distinct ones).

The product of its digits is 32256000, while the sum is 60.

The spelling of 261847541554116 in words is "two hundred sixty-one trillion, eight hundred forty-seven billion, five hundred forty-one million, five hundred fifty-four thousand, one hundred sixteen".