71771007079 has 4 divisors (see below), whose sum is σ = 72142877776. Its totient is φ = 71399136384.

The previous prime is 71771007071. The next prime is 71771007089. The reversal of 71771007079 is 97070017717.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97070017717 = 68669 ⋅1413593.

It is a cyclic number.

It is not a de Polignac number, because 71771007079 - 2³ = 71771007071 is a prime.

It is a super-2 number, since 2×71771007079² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71771007071) 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, 185935059 + ... + 185935444.

It is an arithmetic number, because the mean of its divisors is an integer number (18035719444).

Almost surely, 2^71771007079 is an apocalyptic number.

71771007079 is a deficient number, since it is larger than the sum of its proper divisors (371870697).

71771007079 is a wasteful number, since it uses less digits than its factorization.

71771007079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371870696.

The product of its (nonzero) digits is 151263, while the sum is 46.

The spelling of 71771007079 in words is "seventy-one billion, seven hundred seventy-one million, seven thousand, seventy-nine".