261451055532311 has 8 divisors (see below), whose sum is σ = 272818726010880. Its totient is φ = 250083404493912.

The previous prime is 261451055532287. The next prime is 261451055532313. The reversal of 261451055532311 is 113235550154162.

261451055532311 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 261451055532311 - 2¹⁰ = 261451055531287 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 (261451055532313) 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, 27092426 + ... + 35452808.

It is an arithmetic number, because the mean of its divisors is an integer number (34102340751360).

Almost surely, 2^{261451055532311} is an apocalyptic number.

261451055532311 is a deficient number, since it is larger than the sum of its proper divisors (11367670478569).

261451055532311 is a wasteful number, since it uses less digits than its factorization.

261451055532311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9720085.

The product of its (nonzero) digits is 540000, while the sum is 44.

The spelling of 261451055532311 in words is "two hundred sixty-one trillion, four hundred fifty-one billion, fifty-five million, five hundred thirty-two thousand, three hundred eleven".