71403856225 has 27 divisors (see below), whose sum is σ = 95898848409. Its totient is φ = 52716175200.

The previous prime is 71403856211. The next prime is 71403856259. The reversal of 71403856225 is 52265830417.

The square root of 71403856225 is 267215.

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

It can be written as a sum of positive squares in 4 ways, for example, as 18404449569 + 52999406656 = 135663^2 + 230216^2 .

It is not a de Polignac number, because 71403856225 - 2⁹ = 71403855713 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 17366920 + ... + 17371030.

Almost surely, 2^71403856225 is an apocalyptic number.

71403856225 is the 267215-th square number.

71403856225 is the 133608-th centered octagonal number.

It is an amenable number.

71403856225 is a deficient number, since it is larger than the sum of its proper divisors (24494992184).

71403856225 is an frugal number, since it uses more digits than its factorization.

71403856225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8258 (or 4129 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 43.

The spelling of 71403856225 in words is "seventy-one billion, four hundred three million, eight hundred fifty-six thousand, two hundred twenty-five".