770724212281 has 3 divisors (see below), whose sum is σ = 770725090191. Its totient is φ = 770723334372.

The previous prime is 770724212207. The next prime is 770724212311. The reversal of 770724212281 is 182212427077.

The square root of 770724212281 is 877909.

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: 182212427077 = 2521 ⋅72277837.

It can be written as a sum of positive squares in only one way, i.e., 566871962281 + 203852250000 = 752909^2 + 451500^2 .

It is not a de Polignac number, because 770724212281 - 2¹⁵ = 770724179513 is a prime.

It is a super-2 number, since 2×770724212281² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (770724212081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 438955 + ... + 1316863.

It is an arithmetic number, because the mean of its divisors is an integer number (256908363397).

Almost surely, 2^770724212281 is an apocalyptic number.

770724212281 is the 877909-th square number.

770724212281 is the 438955-th centered octagonal number.

It is an amenable number.

770724212281 is a deficient number, since it is larger than the sum of its proper divisors (877910).

770724212281 is an frugal number, since it uses more digits than its factorization.

770724212281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1755818 (or 877909 counting only the distinct ones).

The product of its (nonzero) digits is 175616, while the sum is 43.

The spelling of 770724212281 in words is "seven hundred seventy billion, seven hundred twenty-four million, two hundred twelve thousand, two hundred eighty-one".