261430545211711 has 8 divisors (see below), whose sum is σ = 265861897522560. Its totient is φ = 256999203771672.

The previous prime is 261430545211631. The next prime is 261430545211733. The reversal of 261430545211711 is 117112545034162.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 261430545211711 - 2²³ = 261430536823103 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 (261430545211751) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56707536 + ... + 61144138.

It is an arithmetic number, because the mean of its divisors is an integer number (33232737190320).

Almost surely, 2^{261430545211711} is an apocalyptic number.

261430545211711 is a deficient number, since it is larger than the sum of its proper divisors (4431352310849).

261430545211711 is an equidigital number, since it uses as much as digits as its factorization.

261430545211711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5435405.

The product of its (nonzero) digits is 201600, while the sum is 43.

The spelling of 261430545211711 in words is "two hundred sixty-one trillion, four hundred thirty billion, five hundred forty-five million, two hundred eleven thousand, seven hundred eleven".