71861641124 has 24 divisors (see below), whose sum is σ = 154778920128. Its totient is φ = 28428780960.

The previous prime is 71861641087. The next prime is 71861641127. The reversal of 71861641124 is 42114616817.

It is not an unprimeable number, because it can be changed into a prime (71861641127) 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 7 ways as a sum of consecutive naturals, for example, 98710682 + ... + 98711409.

It is an arithmetic number, because the mean of its divisors is an integer number (6449121672).

Almost surely, 2^71861641124 is an apocalyptic number.

It is an amenable number.

71861641124 is an abundant number, since it is smaller than the sum of its proper divisors (82917279004).

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

71861641124 is a wasteful number, since it uses less digits than its factorization.

71861641124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197422115 (or 197422113 counting only the distinct ones).

The product of its digits is 64512, while the sum is 41.

The spelling of 71861641124 in words is "seventy-one billion, eight hundred sixty-one million, six hundred forty-one thousand, one hundred twenty-four".