71080686493 has 4 divisors (see below), whose sum is σ = 71198957788. Its totient is φ = 70962415200.

The previous prime is 71080686461. The next prime is 71080686499. The reversal of 71080686493 is 39468608017.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39468608017 = 158597 ⋅248861.

It can be written as a sum of positive squares in 2 ways, for example, as 60109799929 + 10970886564 = 245173^2 + 104742^2 .

It is a cyclic number.

It is not a de Polignac number, because 71080686493 - 2⁵ = 71080686461 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 71080686493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71080686499) by changing a digit.

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, 59134746 + ... + 59135947.

It is an arithmetic number, because the mean of its divisors is an integer number (17799739447).

Almost surely, 2^71080686493 is an apocalyptic number.

It is an amenable number.

71080686493 is a deficient number, since it is larger than the sum of its proper divisors (118271295).

71080686493 is a wasteful number, since it uses less digits than its factorization.

71080686493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118271294.

The product of its (nonzero) digits is 1741824, while the sum is 52.

The spelling of 71080686493 in words is "seventy-one billion, eighty million, six hundred eighty-six thousand, four hundred ninety-three".