261613013511435 has 16 divisors (see below), whose sum is σ = 418581173905440. Its totient is φ = 139526823110400.

The previous prime is 261613013511427. The next prime is 261613013511467. The reversal of 261613013511435 is 534115310316162.

It is not a de Polignac number, because 261613013511435 - 2³ = 261613013511427 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12873135 + ... + 26247735.

It is an arithmetic number, because the mean of its divisors is an integer number (26161323369090).

Almost surely, 2^{261613013511435} is an apocalyptic number.

261613013511435 is a deficient number, since it is larger than the sum of its proper divisors (156968160394005).

261613013511435 is a wasteful number, since it uses less digits than its factorization.

261613013511435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14678638.

The product of its (nonzero) digits is 194400, while the sum is 42.

Adding to 261613013511435 its reverse (534115310316162), we get a palindrome (795728323827597).

The spelling of 261613013511435 in words is "two hundred sixty-one trillion, six hundred thirteen billion, thirteen million, five hundred eleven thousand, four hundred thirty-five".