261536040134342 has 32 divisors (see below), whose sum is σ = 409478738961600. Its totient is φ = 125046409404928.

The previous prime is 261536040134339. The next prime is 261536040134351. The reversal of 261536040134342 is 243431040635162.

It is a super-2 number, since 2×261536040134342² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 261536040134293 and 261536040134302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2668441034 + ... + 2668539042.

It is an arithmetic number, because the mean of its divisors is an integer number (12796210592550).

Almost surely, 2^{261536040134342} is an apocalyptic number.

261536040134342 is a deficient number, since it is larger than the sum of its proper divisors (147942698827258).

261536040134342 is a wasteful number, since it uses less digits than its factorization.

261536040134342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114160.

The product of its (nonzero) digits is 1244160, while the sum is 44.

The spelling of 261536040134342 in words is "two hundred sixty-one trillion, five hundred thirty-six billion, forty million, one hundred thirty-four thousand, three hundred forty-two".