71987575344050 has 72 divisors (see below), whose sum is σ = 141621556898052. Its totient is φ = 27220324464000.

The previous prime is 71987575344029. The next prime is 71987575344137. The reversal of 71987575344050 is 5044357578917.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 25984414495081 + 46003160848969 = 5097491^2 + 6782563^2 .

It is a super-2 number, since 2×71987575344050² (a number of 29 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3995420 + ... + 12646680.

Almost surely, 2^{71987575344050} is an apocalyptic number.

71987575344050 is a deficient number, since it is larger than the sum of its proper divisors (69633981554002).

71987575344050 is a wasteful number, since it uses less digits than its factorization.

71987575344050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8651772 (or 8651748 counting only the distinct ones).

The product of its (nonzero) digits is 148176000, while the sum is 65.

The spelling of 71987575344050 in words is "seventy-one trillion, nine hundred eighty-seven billion, five hundred seventy-five million, three hundred forty-four thousand, fifty".