71220787559 has 16 divisors (see below), whose sum is σ = 72295711488. Its totient is φ = 70154483712.

The previous prime is 71220787489. The next prime is 71220787577. The reversal of 71220787559 is 95578702217.

It is a cyclic number.

It is not a de Polignac number, because 71220787559 - 2¹² = 71220783463 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 71220787559.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71220787459) 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 15 ways as a sum of consecutive naturals, for example, 17789852 + ... + 17793854.

It is an arithmetic number, because the mean of its divisors is an integer number (4518481968).

Almost surely, 2^71220787559 is an apocalyptic number.

71220787559 is a deficient number, since it is larger than the sum of its proper divisors (1074923929).

71220787559 is a wasteful number, since it uses less digits than its factorization.

71220787559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5014.

The product of its (nonzero) digits is 2469600, while the sum is 53.

The spelling of 71220787559 in words is "seventy-one billion, two hundred twenty million, seven hundred eighty-seven thousand, five hundred fifty-nine".