71478713573 has 4 divisors (see below), whose sum is σ = 71644557888. Its totient is φ = 71312869260.

The previous prime is 71478713533. The next prime is 71478713591. The reversal of 71478713573 is 37531787417.

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, and also an emirpimes, since its reverse is a distinct semiprime: 37531787417 = 17 ⋅2207752201.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71478713573 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 (71478713533) 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, 82921511 + ... + 82922372.

It is an arithmetic number, because the mean of its divisors is an integer number (17911139472).

Almost surely, 2^71478713573 is an apocalyptic number.

It is an amenable number.

71478713573 is a deficient number, since it is larger than the sum of its proper divisors (165844315).

71478713573 is a wasteful number, since it uses less digits than its factorization.

71478713573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165844314.

The product of its digits is 3457440, while the sum is 53.

The spelling of 71478713573 in words is "seventy-one billion, four hundred seventy-eight million, seven hundred thirteen thousand, five hundred seventy-three".