71130698821 has 24 divisors (see below), whose sum is σ = 89687450880. Its totient is φ = 55217313216.

The previous prime is 71130698819. The next prime is 71130698831. The reversal of 71130698821 is 12889603117.

It is a happy number.

It is not a de Polignac number, because 71130698821 - 2¹ = 71130698819 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71130698831) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 504541 + ... + 629938.

It is an arithmetic number, because the mean of its divisors is an integer number (3736977120).

Almost surely, 2^71130698821 is an apocalyptic number.

It is an amenable number.

71130698821 is a deficient number, since it is larger than the sum of its proper divisors (18556752059).

71130698821 is a wasteful number, since it uses less digits than its factorization.

71130698821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1134565 (or 1134552 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 46.

The spelling of 71130698821 in words is "seventy-one billion, one hundred thirty million, six hundred ninety-eight thousand, eight hundred twenty-one".