71051568025 has 27 divisors (see below), whose sum is σ = 89254003741. Its totient is φ = 56108761280.

The previous prime is 71051567999. The next prime is 71051568041. The reversal of 71051568025 is 52086515017.

It is a happy number.

The square root of 71051568025 is 266555.

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 14785830409 + 56265737616 = 121597^2 + 237204^2 .

It is not a de Polignac number, because 71051568025 - 2¹³ = 71051559833 is a prime.

It is a super-2 number, since 2×71051568025² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

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, 118616676 + ... + 118617274.

Almost surely, 2^71051568025 is an apocalyptic number.

71051568025 is the 266555-th square number.

71051568025 is the 133278-th centered octagonal number.

It is an amenable number.

71051568025 is a deficient number, since it is larger than the sum of its proper divisors (18202435716).

71051568025 is an frugal number, since it uses more digits than its factorization.

71051568025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1386 (or 693 counting only the distinct ones).

The product of its (nonzero) digits is 84000, while the sum is 40.

The spelling of 71051568025 in words is "seventy-one billion, fifty-one million, five hundred sixty-eight thousand, twenty-five".