71017787097 has 8 divisors (see below), whose sum is σ = 105211536480. Its totient is φ = 47345191380.

The previous prime is 71017787081. The next prime is 71017787117. The reversal of 71017787097 is 79078771017.

It is a happy number.

It is not a de Polignac number, because 71017787097 - 2⁴ = 71017787081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71017787017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1315144179 + ... + 1315144232.

It is an arithmetic number, because the mean of its divisors is an integer number (13151442060).

Almost surely, 2^71017787097 is an apocalyptic number.

It is an amenable number.

71017787097 is a deficient number, since it is larger than the sum of its proper divisors (34193749383).

71017787097 is a wasteful number, since it uses less digits than its factorization.

71017787097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2630288420 (or 2630288414 counting only the distinct ones).

The product of its (nonzero) digits is 1210104, while the sum is 54.

The spelling of 71017787097 in words is "seventy-one billion, seventeen million, seven hundred eighty-seven thousand, ninety-seven".