261536533532 has 24 divisors (see below), whose sum is σ = 472525764480. Its totient is φ = 126530470080.

The previous prime is 261536533523. The next prime is 261536533537. The reversal of 261536533532 is 235335635162.

It is a happy number.

261536533532 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261536533537) 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, 664094 + ... + 981882.

It is an arithmetic number, because the mean of its divisors is an integer number (19688573520).

Almost surely, 2^261536533532 is an apocalyptic number.

It is an amenable number.

261536533532 is a deficient number, since it is larger than the sum of its proper divisors (210989230948).

261536533532 is a wasteful number, since it uses less digits than its factorization.

261536533532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324461 (or 324459 counting only the distinct ones).

The product of its digits is 1458000, while the sum is 44.

The spelling of 261536533532 in words is "two hundred sixty-one billion, five hundred thirty-six million, five hundred thirty-three thousand, five hundred thirty-two".