70512022681 has 3 divisors (see below), whose sum is σ = 70512288223. Its totient is φ = 70511757140.

The previous prime is 70512022673. The next prime is 70512022699. The reversal of 70512022681 is 18622021507.

It is a happy number.

The square root of 70512022681 is 265541.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 18622021507 = 23 ⋅809653109.

It can be written as a sum of positive squares in only one way, i.e., 37380742281 + 33131280400 = 193341^2 + 182020^2 .

It is not a de Polignac number, because 70512022681 - 2³ = 70512022673 is a prime.

It is a super-2 number, since 2×70512022681² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70512022621) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 132771 + ... + 398311.

Almost surely, 2^70512022681 is an apocalyptic number.

70512022681 is the 265541-st square number.

70512022681 is the 132771-st centered octagonal number.

It is an amenable number.

70512022681 is a deficient number, since it is larger than the sum of its proper divisors (265542).

70512022681 is an frugal number, since it uses more digits than its factorization.

70512022681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531082 (or 265541 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 34.

The spelling of 70512022681 in words is "seventy billion, five hundred twelve million, twenty-two thousand, six hundred eighty-one".