71810003845 has 8 divisors (see below), whose sum is σ = 86371018776. Its totient is φ = 57315326976.

The previous prime is 71810003843. The next prime is 71810003857. The reversal of 71810003845 is 54830001817.

It can be written as a sum of positive squares in 4 ways, for example, as 62631396 + 71747372449 = 7914^2 + 267857^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71810003845 - 2¹ = 71810003843 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 (71810003843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16582132 + ... + 16586461.

It is an arithmetic number, because the mean of its divisors is an integer number (10796377347).

Almost surely, 2^71810003845 is an apocalyptic number.

It is an amenable number.

71810003845 is a deficient number, since it is larger than the sum of its proper divisors (14561014931).

71810003845 is a wasteful number, since it uses less digits than its factorization.

71810003845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33169031.

The product of its (nonzero) digits is 26880, while the sum is 37.

The spelling of 71810003845 in words is "seventy-one billion, eight hundred ten million, three thousand, eight hundred forty-five".