261052513602 has 16 divisors (see below), whose sum is σ = 522384100992. Its totient is φ = 86970992240.

The previous prime is 261052513597. The next prime is 261052513651. The reversal of 261052513602 is 206315250162.

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, 11615913 + ... + 11638364.

It is an arithmetic number, because the mean of its divisors is an integer number (32649006312).

Almost surely, 2^261052513602 is an apocalyptic number.

261052513602 is an abundant number, since it is smaller than the sum of its proper divisors (261331587390).

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

261052513602 is a wasteful number, since it uses less digits than its factorization.

261052513602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23256153.

The product of its (nonzero) digits is 21600, while the sum is 33.

Adding to 261052513602 its reverse (206315250162), we get a palindrome (467367763764).

The spelling of 261052513602 in words is "two hundred sixty-one billion, fifty-two million, five hundred thirteen thousand, six hundred two".