261153011135 has 16 divisors (see below), whose sum is σ = 327083097600. Its totient is φ = 199793536800.

The previous prime is 261153011113. The next prime is 261153011239. The reversal of 261153011135 is 531110351162.

It is not a de Polignac number, because 261153011135 - 2¹⁸ = 261152748991 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 261153011098 and 261153011107.

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, 256766 + ... + 766964.

It is an arithmetic number, because the mean of its divisors is an integer number (20442693600).

Almost surely, 2^261153011135 is an apocalyptic number.

261153011135 is a deficient number, since it is larger than the sum of its proper divisors (65930086465).

261153011135 is a wasteful number, since it uses less digits than its factorization.

261153011135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514678.

The product of its (nonzero) digits is 2700, while the sum is 29.

Adding to 261153011135 its reverse (531110351162), we get a palindrome (792263362297).

The spelling of 261153011135 in words is "two hundred sixty-one billion, one hundred fifty-three million, eleven thousand, one hundred thirty-five".