71187518412 has 120 divisors (see below), whose sum is σ = 192839539200. Its totient is φ = 22883593824.

The previous prime is 71187518351. The next prime is 71187518419. The reversal of 71187518412 is 21481578117.

71187518412 is a `hidden beast` number, since 7 + 1 + 187 + 51 + 8 + 412 = 666.

It is not an unprimeable number, because it can be changed into a prime (71187518419) 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 39 ways as a sum of consecutive naturals, for example, 1068289 + ... + 1132967.

It is an arithmetic number, because the mean of its divisors is an integer number (1606996160).

Almost surely, 2^71187518412 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71187518412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96419769600).

71187518412 is an abundant number, since it is smaller than the sum of its proper divisors (121652020788).

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

71187518412 is a wasteful number, since it uses less digits than its factorization.

71187518412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64817 (or 64806 counting only the distinct ones).

The product of its digits is 125440, while the sum is 45.

The spelling of 71187518412 in words is "seventy-one billion, one hundred eighty-seven million, five hundred eighteen thousand, four hundred twelve".