71000000001 has 48 divisors (see below), whose sum is σ = 119086980480. Its totient is φ = 39924783360.

The previous prime is 70999999999. The next prime is 71000000041. The reversal of 71000000001 is 10000000017.

It is not a de Polignac number, because 71000000001 - 2¹ = 70999999999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a self number, because there is not a number n which added to its sum of digits gives 71000000001.

It is not an unprimeable number, because it can be changed into a prime (71000000041) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1153071 + ... + 1213083.

It is an arithmetic number, because the mean of its divisors is an integer number (2480978760).

Almost surely, 2^71000000001 is an apocalyptic number.

It is an amenable number.

71000000001 is a deficient number, since it is larger than the sum of its proper divisors (48086980479).

71000000001 is a wasteful number, since it uses less digits than its factorization.

71000000001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60326 (or 60323 counting only the distinct ones).

The product of its (nonzero) digits is 7, while the sum is 9.

Adding to 71000000001 its reverse (10000000017), we get a palindrome (81000000018).

It can be divided in two parts, 7 and 1000000001, that multiplied together give a palindrome (7000000007).

The spelling of 71000000001 in words is "seventy-one billion, one", and thus it is an aban number and an uban number.