261431333417111 has 16 divisors (see below), whose sum is σ = 307146368901120. Its totient is φ = 219375610765920.

The previous prime is 261431333417099. The next prime is 261431333417141. The reversal of 261431333417111 is 111714333134162.

It is a cyclic number.

It is not a de Polignac number, because 261431333417111 - 2³⁰ = 261430259675287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261431333417141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26227415 + ... + 34795688.

It is an arithmetic number, because the mean of its divisors is an integer number (19196648056320).

Almost surely, 2^{261431333417111} is an apocalyptic number.

261431333417111 is a deficient number, since it is larger than the sum of its proper divisors (45715035484009).

261431333417111 is a wasteful number, since it uses less digits than its factorization.

261431333417111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61053086.

The product of its digits is 108864, while the sum is 41.

The spelling of 261431333417111 in words is "two hundred sixty-one trillion, four hundred thirty-one billion, three hundred thirty-three million, four hundred seventeen thousand, one hundred eleven".