261708052122 has 48 divisors (see below), whose sum is σ = 624363865632. Its totient is φ = 78564291360.

The previous prime is 261708052091. The next prime is 261708052183. The reversal of 261708052122 is 221250807162.

It is a happy number.

261708052122 is a `hidden beast` number, since 2 + 61 + 70 + 8 + 0 + 521 + 2 + 2 = 666.

It is a super-2 number, since 2×261708052122² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 6155253 + ... + 6197624.

It is an arithmetic number, because the mean of its divisors is an integer number (13007580534).

Almost surely, 2^261708052122 is an apocalyptic number.

261708052122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

261708052122 is an abundant number, since it is smaller than the sum of its proper divisors (362655813510).

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

261708052122 is a wasteful number, since it uses less digits than its factorization.

261708052122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12353003 (or 12353000 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

Adding to 261708052122 its reverse (221250807162), we get a palindrome (482958859284).

The spelling of 261708052122 in words is "two hundred sixty-one billion, seven hundred eight million, fifty-two thousand, one hundred twenty-two".