71283321505 has 16 divisors (see below), whose sum is σ = 95301805824. Its totient is φ = 50739383680.

The previous prime is 71283321479. The next prime is 71283321523. The reversal of 71283321505 is 50512338217.

It is not a de Polignac number, because 71283321505 - 2⁷ = 71283321377 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13785292 + ... + 13790461.

It is an arithmetic number, because the mean of its divisors is an integer number (5956362864).

Almost surely, 2^71283321505 is an apocalyptic number.

It is an amenable number.

71283321505 is a deficient number, since it is larger than the sum of its proper divisors (24018484319).

71283321505 is a wasteful number, since it uses less digits than its factorization.

71283321505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27575816.

The product of its (nonzero) digits is 50400, while the sum is 37.

The spelling of 71283321505 in words is "seventy-one billion, two hundred eighty-three million, three hundred twenty-one thousand, five hundred five".