261534452164136 has 16 divisors (see below), whose sum is σ = 490377705864000. Its totient is φ = 130767063933744.

The previous prime is 261534452164121. The next prime is 261534452164147. The reversal of 261534452164136 is 631461254435162.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13271486 + ... + 26442413.

It is an arithmetic number, because the mean of its divisors is an integer number (30648606616500).

Almost surely, 2^{261534452164136} is an apocalyptic number.

It is an amenable number.

261534452164136 is a deficient number, since it is larger than the sum of its proper divisors (228843253699864).

261534452164136 is a wasteful number, since it uses less digits than its factorization.

261534452164136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40537088 (or 40537084 counting only the distinct ones).

The product of its digits is 12441600, while the sum is 53.

The spelling of 261534452164136 in words is "two hundred sixty-one trillion, five hundred thirty-four billion, four hundred fifty-two million, one hundred sixty-four thousand, one hundred thirty-six".