261153011132 has 24 divisors (see below), whose sum is σ = 494749823232. Its totient is φ = 119901096000.

The previous prime is 261153011113. The next prime is 261153011239. The reversal of 261153011132 is 231110351162.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13137119 + ... + 13156982.

It is an arithmetic number, because the mean of its divisors is an integer number (20614575968).

Almost surely, 2^261153011132 is an apocalyptic number.

It is an amenable number.

261153011132 is a deficient number, since it is larger than the sum of its proper divisors (233596812100).

261153011132 is a wasteful number, since it uses less digits than its factorization.

261153011132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26294309 (or 26294307 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 26.

Adding to 261153011132 its reverse (231110351162), we get a palindrome (492263362294).

The spelling of 261153011132 in words is "two hundred sixty-one billion, one hundred fifty-three million, eleven thousand, one hundred thirty-two".