261052117216 has 48 divisors (see below), whose sum is σ = 561239860608. Its totient is φ = 118539184000.

The previous prime is 261052117211. The next prime is 261052117237. The reversal of 261052117216 is 612711250162.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261052117211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31210 + ... + 723241.

It is an arithmetic number, because the mean of its divisors is an integer number (11692497096).

Almost surely, 2^261052117216 is an apocalyptic number.

It is an amenable number.

261052117216 is an abundant number, since it is smaller than the sum of its proper divisors (300187743392).

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

261052117216 is a wasteful number, since it uses less digits than its factorization.

261052117216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755455 (or 755447 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 34.

Adding to 261052117216 its reverse (612711250162), we get a palindrome (873763367378).

The spelling of 261052117216 in words is "two hundred sixty-one billion, fifty-two million, one hundred seventeen thousand, two hundred sixteen".