71050055681 has 4 divisors (see below), whose sum is σ = 77509151664. Its totient is φ = 64590959700.

The previous prime is 71050055677. The next prime is 71050055683. The reversal of 71050055681 is 18655005017.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18655005017 = 11 ⋅1695909547.

It is a cyclic number.

It is not a de Polignac number, because 71050055681 - 2² = 71050055677 is a prime.

It is a super-2 number, since 2×71050055681² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71050055683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3229547975 + ... + 3229547996.

It is an arithmetic number, because the mean of its divisors is an integer number (19377287916).

Almost surely, 2^71050055681 is an apocalyptic number.

It is an amenable number.

71050055681 is a deficient number, since it is larger than the sum of its proper divisors (6459095983).

71050055681 is a wasteful number, since it uses less digits than its factorization.

71050055681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6459095982.

The product of its (nonzero) digits is 42000, while the sum is 38.

The spelling of 71050055681 in words is "seventy-one billion, fifty million, fifty-five thousand, six hundred eighty-one".