261063542322 has 128 divisors (see below), whose sum is σ = 677113804800. Its totient is φ = 73717646400.

The previous prime is 261063542143. The next prime is 261063542323. The reversal of 261063542322 is 223245360162.

261063542322 is a `hidden beast` number, since 2 + 6 + 10 + 635 + 4 + 2 + 3 + 2 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (261063542323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 498843 + ... + 878049.

It is an arithmetic number, because the mean of its divisors is an integer number (5289951600).

Almost surely, 2^261063542322 is an apocalyptic number.

261063542322 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 261063542322, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (338556902400).

261063542322 is an abundant number, since it is smaller than the sum of its proper divisors (416050262478).

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

261063542322 is a wasteful number, since it uses less digits than its factorization.

261063542322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379309 (or 379303 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 36.

The spelling of 261063542322 in words is "two hundred sixty-one billion, sixty-three million, five hundred forty-two thousand, three hundred twenty-two".