261140504133 has 16 divisors (see below), whose sum is σ = 355768344576. Its totient is φ = 170306766000.

The previous prime is 261140504111. The next prime is 261140504143. The reversal of 261140504133 is 331405041162.

It is not a de Polignac number, because 261140504133 - 2²⁰ = 261139455557 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 261140504133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261140504143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 157993 + ... + 739758.

It is an arithmetic number, because the mean of its divisors is an integer number (22235521536).

Almost surely, 2^261140504133 is an apocalyptic number.

It is an amenable number.

261140504133 is a deficient number, since it is larger than the sum of its proper divisors (94627840443).

261140504133 is a wasteful number, since it uses less digits than its factorization.

261140504133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 899864.

The product of its (nonzero) digits is 8640, while the sum is 30.

Adding to 261140504133 its reverse (331405041162), we get a palindrome (592545545295).

The spelling of 261140504133 in words is "two hundred sixty-one billion, one hundred forty million, five hundred four thousand, one hundred thirty-three".