71873500513 has 2 divisors, whose sum is σ = 71873500514. Its totient is φ = 71873500512.

The previous prime is 71873500493. The next prime is 71873500537. The reversal of 71873500513 is 31500537817.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67507991329 + 4365509184 = 259823^2 + 66072^2 .

It is a cyclic number.

It is not a de Polignac number, because 71873500513 - 2¹³ = 71873492321 is a prime.

It is a super-2 number, since 2×71873500513² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (71873500553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35936750256 + 35936750257.

It is an arithmetic number, because the mean of its divisors is an integer number (35936750257).

Almost surely, 2^71873500513 is an apocalyptic number.

It is an amenable number.

71873500513 is a deficient number, since it is larger than the sum of its proper divisors (1).

71873500513 is an equidigital number, since it uses as much as digits as its factorization.

71873500513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 88200, while the sum is 40.

The spelling of 71873500513 in words is "seventy-one billion, eight hundred seventy-three million, five hundred thousand, five hundred thirteen".