71070761281 has 9 divisors (see below), whose sum is σ = 76962032931. Its totient is φ = 65600580552.

The previous prime is 71070761269. The next prime is 71070761291. The reversal of 71070761281 is 18216707017.

The square root of 71070761281 is 266591.

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., 10513426225 + 60557335056 = 102535^2 + 246084^2 .

It is not a de Polignac number, because 71070761281 - 2¹⁷ = 71070630209 is a prime.

It is a super-2 number, since 2×71070761281² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71070761291) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3455430 + ... + 3475936.

Almost surely, 2^71070761281 is an apocalyptic number.

71070761281 is the 266591-st square number.

71070761281 is the 133296-th centered octagonal number.

It is an amenable number.

71070761281 is a deficient number, since it is larger than the sum of its proper divisors (5891271650).

71070761281 is an frugal number, since it uses more digits than its factorization.

71070761281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41040 (or 20520 counting only the distinct ones).

The product of its (nonzero) digits is 32928, while the sum is 40.

The spelling of 71070761281 in words is "seventy-one billion, seventy million, seven hundred sixty-one thousand, two hundred eighty-one".