71015887745 has 16 divisors (see below), whose sum is σ = 94944261888. Its totient is φ = 50549024640.

The previous prime is 71015887727. The next prime is 71015887829. The reversal of 71015887745 is 54778851017.

It is not a de Polignac number, because 71015887745 - 2¹⁶ = 71015822209 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 13733564 + ... + 13738733.

It is an arithmetic number, because the mean of its divisors is an integer number (5934016368).

Almost surely, 2^71015887745 is an apocalyptic number.

It is an amenable number.

71015887745 is a deficient number, since it is larger than the sum of its proper divisors (23928374143).

71015887745 is a wasteful number, since it uses less digits than its factorization.

71015887745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27472360.

The product of its (nonzero) digits is 2195200, while the sum is 53.

The spelling of 71015887745 in words is "seventy-one billion, fifteen million, eight hundred eighty-seven thousand, seven hundred forty-five".