261431333417135 has 16 divisors (see below), whose sum is σ = 358534936865856. Its totient is φ = 179266931682048.

The previous prime is 261431333417099. The next prime is 261431333417141. The reversal of 261431333417135 is 531714333134162.

It is not a de Polignac number, because 261431333417135 - 2¹⁰ = 261431333416111 is a prime.

It is a super-2 number, since 2×261431333417135² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 261431333417135.

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, 19737989 + ... + 30206801.

It is an arithmetic number, because the mean of its divisors is an integer number (22408433554116).

Almost surely, 2^{261431333417135} is an apocalyptic number.

261431333417135 is a deficient number, since it is larger than the sum of its proper divisors (97103603448721).

261431333417135 is a wasteful number, since it uses less digits than its factorization.

261431333417135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11182322.

The product of its digits is 1632960, while the sum is 47.

The spelling of 261431333417135 in words is "two hundred sixty-one trillion, four hundred thirty-one billion, three hundred thirty-three million, four hundred seventeen thousand, one hundred thirty-five".