71999043300625 has 45 divisors (see below), whose sum is σ = 104661143376669. Its totient is φ = 49369754322000.

The previous prime is 71999043300607. The next prime is 71999043300643. The reversal of 71999043300625 is 52600334099917.

It is a happy number.

The square root of 71999043300625 is 8485225.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (71999043300607) and next prime (71999043300643).

It can be written as a sum of positive squares in 2 ways, for example, as 5644724994769 + 66354318305856 = 2375863^2 + 8145816^2 .

It is not a de Polignac number, because 71999043300625 - 2²⁵ = 71999009746193 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71999043300625.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 1484890132 + ... + 1484938618.

Almost surely, 2^{71999043300625} is an apocalyptic number.

71999043300625 is the 8485225-th square number.

71999043300625 is the 4242613-rd centered octagonal number.

It is an amenable number.

71999043300625 is a deficient number, since it is larger than the sum of its proper divisors (32662100076044).

71999043300625 is an frugal number, since it uses more digits than its factorization.

71999043300625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97008 (or 48499 counting only the distinct ones).

The product of its (nonzero) digits is 11022480, while the sum is 58.

The spelling of 71999043300625 in words is "seventy-one trillion, nine hundred ninety-nine billion, forty-three million, three hundred thousand, six hundred twenty-five".