71349358081 has 4 divisors (see below), whose sum is σ = 71647891200. Its totient is φ = 71050824964.

The previous prime is 71349358079. The next prime is 71349358099. The reversal of 71349358081 is 18085394317.

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.

It is a cyclic number.

It is not a de Polignac number, because 71349358081 - 2¹ = 71349358079 is a prime.

It is a super-2 number, since 2×71349358081² (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 (71349353081) 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, 149266201 + ... + 149266678.

It is an arithmetic number, because the mean of its divisors is an integer number (17911972800).

Almost surely, 2^71349358081 is an apocalyptic number.

It is an amenable number.

71349358081 is a deficient number, since it is larger than the sum of its proper divisors (298533119).

71349358081 is a wasteful number, since it uses less digits than its factorization.

71349358081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298533118.

The product of its (nonzero) digits is 725760, while the sum is 49.

The spelling of 71349358081 in words is "seventy-one billion, three hundred forty-nine million, three hundred fifty-eight thousand, eighty-one".