71529983287818 has 128 divisors (see below), whose sum is σ = 165545071163136. Its totient is φ = 20363772211200.

The previous prime is 71529983287811. The next prime is 71529983287837. The reversal of 71529983287818 is 81878238992517.

It is a super-2 number, since 2×71529983287818² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (71529983287811) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2875333596 + ... + 2875358472.

It is an arithmetic number, because the mean of its divisors is an integer number (1293320868462).

Almost surely, 2^{71529983287818} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71529983287818, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82772535581568).

71529983287818 is an abundant number, since it is smaller than the sum of its proper divisors (94015087875318).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71529983287818 is a wasteful number, since it uses less digits than its factorization.

71529983287818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29448.

The product of its digits is 975421440, while the sum is 78.

The spelling of 71529983287818 in words is "seventy-one trillion, five hundred twenty-nine billion, nine hundred eighty-three million, two hundred eighty-seven thousand, eight hundred eighteen".