71809261255 has 8 divisors (see below), whose sum is σ = 86669213472. Its totient is φ = 57115342368.

The previous prime is 71809261243. The next prime is 71809261261. The reversal of 71809261255 is 55216290817.

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 71809261255 - 2²⁵ = 71775706823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41507379 + ... + 41509108.

It is an arithmetic number, because the mean of its divisors is an integer number (10833651684).

Almost surely, 2^71809261255 is an apocalyptic number.

71809261255 is a deficient number, since it is larger than the sum of its proper divisors (14859952217).

71809261255 is a wasteful number, since it uses less digits than its factorization.

71809261255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83016665.

The product of its (nonzero) digits is 302400, while the sum is 46.

The spelling of 71809261255 in words is "seventy-one billion, eight hundred nine million, two hundred sixty-one thousand, two hundred fifty-five".