71563520145 has 16 divisors (see below), whose sum is σ = 123309450432. Its totient is φ = 35231271360.

The previous prime is 71563520143. The next prime is 71563520167. The reversal of 71563520145 is 54102536517.

It is not a de Polignac number, because 71563520145 - 2¹ = 71563520143 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (71563520143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 183496011 + ... + 183496400.

It is an arithmetic number, because the mean of its divisors is an integer number (7706840652).

Almost surely, 2^71563520145 is an apocalyptic number.

It is an amenable number.

71563520145 is a deficient number, since it is larger than the sum of its proper divisors (51745930287).

71563520145 is a wasteful number, since it uses less digits than its factorization.

71563520145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366992432.

The product of its (nonzero) digits is 126000, while the sum is 39.

The spelling of 71563520145 in words is "seventy-one billion, five hundred sixty-three million, five hundred twenty thousand, one hundred forty-five".