71543130625 has 40 divisors (see below), whose sum is σ = 91920957128. Its totient is φ = 55624320000.

The previous prime is 71543130569. The next prime is 71543130661. The reversal of 71543130625 is 52603134517.

It can be written as a sum of positive squares in 20 ways, for example, as 71450893809 + 92236816 = 267303^2 + 9604^2 .

It is not a de Polignac number, because 71543130625 - 2¹¹ = 71543128577 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 40259737 + ... + 40261513.

Almost surely, 2^71543130625 is an apocalyptic number.

It is an amenable number.

71543130625 is a deficient number, since it is larger than the sum of its proper divisors (20377826503).

71543130625 is a wasteful number, since it uses less digits than its factorization.

71543130625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3575 (or 3560 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 37.

The spelling of 71543130625 in words is "seventy-one billion, five hundred forty-three million, one hundred thirty thousand, six hundred twenty-five".