71321597063 has 4 divisors (see below), whose sum is σ = 71842192800. Its totient is φ = 70801001328.

The previous prime is 71321597033. The next prime is 71321597119. The reversal of 71321597063 is 36079512317.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 71321597063 - 2⁶ = 71321596999 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 (71321597033) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 260297663 + ... + 260297936.

It is an arithmetic number, because the mean of its divisors is an integer number (17960548200).

Almost surely, 2^71321597063 is an apocalyptic number.

71321597063 is a deficient number, since it is larger than the sum of its proper divisors (520595737).

71321597063 is a wasteful number, since it uses less digits than its factorization.

71321597063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520595736.

The product of its (nonzero) digits is 238140, while the sum is 44.

The spelling of 71321597063 in words is "seventy-one billion, three hundred twenty-one million, five hundred ninety-seven thousand, sixty-three".