71327477257 has 4 divisors (see below), whose sum is σ = 71368876240. Its totient is φ = 71286078276.

The previous prime is 71327477251. The next prime is 71327477267. The reversal of 71327477257 is 75277472317.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 71327477257 - 2¹⁹ = 71326952969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71327477251) 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, 20696907 + ... + 20700352.

It is an arithmetic number, because the mean of its divisors is an integer number (17842219060).

Almost surely, 2^71327477257 is an apocalyptic number.

It is an amenable number.

71327477257 is a deficient number, since it is larger than the sum of its proper divisors (41398983).

71327477257 is a wasteful number, since it uses less digits than its factorization.

71327477257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41398982.

The product of its digits is 4033680, while the sum is 52.

The spelling of 71327477257 in words is "seventy-one billion, three hundred twenty-seven million, four hundred seventy-seven thousand, two hundred fifty-seven".