261726117133452 has 12 divisors (see below), whose sum is σ = 610694273311416. Its totient is φ = 87242039044480.

The previous prime is 261726117133409. The next prime is 261726117133529. The reversal of 261726117133452 is 254331711627162.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 261726117133395 and 261726117133404.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10905254880549 + ... + 10905254880572.

It is an arithmetic number, because the mean of its divisors is an integer number (50891189442618).

Almost surely, 2^{261726117133452} is an apocalyptic number.

It is an amenable number.

261726117133452 is an abundant number, since it is smaller than the sum of its proper divisors (348968156177964).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261726117133452 is a wasteful number, since it uses less digits than its factorization.

261726117133452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21810509761128 (or 21810509761126 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 51.

The spelling of 261726117133452 in words is "two hundred sixty-one trillion, seven hundred twenty-six billion, one hundred seventeen million, one hundred thirty-three thousand, four hundred fifty-two".