261066235326 has 32 divisors (see below), whose sum is σ = 577493716128. Its totient is φ = 78157042560.

The previous prime is 261066235301. The next prime is 261066235337. The reversal of 261066235326 is 623532660162.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45226885 + ... + 45232656.

It is an arithmetic number, because the mean of its divisors is an integer number (18046678629).

Almost surely, 2^261066235326 is an apocalyptic number.

261066235326 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

261066235326 is an abundant number, since it is smaller than the sum of its proper divisors (316427480802).

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

261066235326 is a wasteful number, since it uses less digits than its factorization.

261066235326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90459596.

The product of its (nonzero) digits is 466560, while the sum is 42.

Adding to 261066235326 its reverse (623532660162), we get a palindrome (884598895488).

The spelling of 261066235326 in words is "two hundred sixty-one billion, sixty-six million, two hundred thirty-five thousand, three hundred twenty-six".