261272427522 has 32 divisors (see below), whose sum is σ = 529204838400. Its totient is φ = 85981001808.

The previous prime is 261272427509. The next prime is 261272427547. The reversal of 261272427522 is 225724272162.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 9706879 + ... + 9733757.

It is an arithmetic number, because the mean of its divisors is an integer number (16537651200).

Almost surely, 2^261272427522 is an apocalyptic number.

261272427522 is an abundant number, since it is smaller than the sum of its proper divisors (267932410878).

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

261272427522 is a wasteful number, since it uses less digits than its factorization.

261272427522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47470.

The product of its digits is 376320, while the sum is 42.

Adding to 261272427522 its reverse (225724272162), we get a palindrome (486996699684).

The spelling of 261272427522 in words is "two hundred sixty-one billion, two hundred seventy-two million, four hundred twenty-seven thousand, five hundred twenty-two".