71663211045 has 24 divisors (see below), whose sum is σ = 124351468800. Its totient is φ = 38178768096.

The previous prime is 71663211013. The next prime is 71663211121. The reversal of 71663211045 is 54011236617.

71663211045 is a `hidden beast` number, since 7 + 1 + 6 + 632 + 1 + 10 + 4 + 5 = 666.

It is not a de Polignac number, because 71663211045 - 2⁵ = 71663211013 is a prime.

It is a Curzon number.

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 23 ways as a sum of consecutive naturals, for example, 825085 + ... + 907794.

It is an arithmetic number, because the mean of its divisors is an integer number (5181311200).

Almost surely, 2^71663211045 is an apocalyptic number.

It is an amenable number.

71663211045 is a deficient number, since it is larger than the sum of its proper divisors (52688257755).

71663211045 is a wasteful number, since it uses less digits than its factorization.

71663211045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1733809 (or 1733806 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The spelling of 71663211045 in words is "seventy-one billion, six hundred sixty-three million, two hundred eleven thousand, forty-five".