261053636431 has 8 divisors (see below), whose sum is σ = 298560281600. Its totient is φ = 223600308408.

The previous prime is 261053636381. The next prime is 261053636447. The reversal of 261053636431 is 134636350162.

261053636431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 261053636431 - 2¹³ = 261053628239 is a prime.

It is a super-2 number, since 2×261053636431² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261053636731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13318791 + ... + 13338376.

It is an arithmetic number, because the mean of its divisors is an integer number (37320035200).

Almost surely, 2^261053636431 is an apocalyptic number.

261053636431 is a deficient number, since it is larger than the sum of its proper divisors (37506645169).

261053636431 is a wasteful number, since it uses less digits than its factorization.

261053636431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26658573.

The product of its (nonzero) digits is 233280, while the sum is 40.

Adding to 261053636431 its reverse (134636350162), we get a palindrome (395689986593).

The spelling of 261053636431 in words is "two hundred sixty-one billion, fifty-three million, six hundred thirty-six thousand, four hundred thirty-one".