71079980285 has 4 divisors (see below), whose sum is σ = 85295976348. Its totient is φ = 56863984224.

The previous prime is 71079980273. The next prime is 71079980303. The reversal of 71079980285 is 58208997017.

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

It can be written as a sum of positive squares in 2 ways, for example, as 49338182884 + 21741797401 = 222122^2 + 147451^2 .

It is a cyclic number.

It is not a de Polignac number, because 71079980285 - 2³⁴ = 53900111101 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71079980285.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7107998024 + ... + 7107998033.

It is an arithmetic number, because the mean of its divisors is an integer number (21323994087).

Almost surely, 2^71079980285 is an apocalyptic number.

It is an amenable number.

71079980285 is a deficient number, since it is larger than the sum of its proper divisors (14215996063).

71079980285 is a wasteful number, since it uses less digits than its factorization.

71079980285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14215996062.

The product of its (nonzero) digits is 2540160, while the sum is 56.

The spelling of 71079980285 in words is "seventy-one billion, seventy-nine million, nine hundred eighty thousand, two hundred eighty-five".