71078226025 has 27 divisors (see below), whose sum is σ = 89515044759. Its totient is φ = 55987050000.

The previous prime is 71078226013. The next prime is 71078226041. The reversal of 71078226025 is 52062287017.

It is a happy number.

The square root of 71078226025 is 266605.

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

It can be written as a sum of positive squares in only one way, i.e., 25588161369 + 45490064656 = 159963^2 + 213284^2 .

It is not a de Polignac number, because 71078226025 - 2⁵ = 71078225993 is a prime.

It is a super-2 number, since 2×71078226025² (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, 94644400 + ... + 94645150.

Almost surely, 2^71078226025 is an apocalyptic number.

71078226025 is the 266605-th square number.

71078226025 is the 133303-rd centered octagonal number.

It is an amenable number.

71078226025 is a deficient number, since it is larger than the sum of its proper divisors (18436818734).

71078226025 is an frugal number, since it uses more digits than its factorization.

71078226025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1654 (or 827 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 40.

The spelling of 71078226025 in words is "seventy-one billion, seventy-eight million, two hundred twenty-six thousand, twenty-five".