261431265022027 has 8 divisors (see below), whose sum is σ = 261663937647840. Its totient is φ = 261198594367680.

The previous prime is 261431265022021. The next prime is 261431265022063. The reversal of 261431265022027 is 720220562134162.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-261431265022027 is a prime.

It is a super-3 number, since 3×261431265022027³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261431265022021) 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, 438175002 + ... + 438771232.

It is an arithmetic number, because the mean of its divisors is an integer number (32707992205980).

Almost surely, 2^{261431265022027} is an apocalyptic number.

261431265022027 is a deficient number, since it is larger than the sum of its proper divisors (232672625813).

261431265022027 is a wasteful number, since it uses less digits than its factorization.

261431265022027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 985733.

The product of its (nonzero) digits is 483840, while the sum is 43.

The spelling of 261431265022027 in words is "two hundred sixty-one trillion, four hundred thirty-one billion, two hundred sixty-five million, twenty-two thousand, twenty-seven".