708191254681 has 3 divisors (see below), whose sum is σ = 708192096223. Its totient is φ = 708190413140.

The previous prime is 708191254621. The next prime is 708191254723. The reversal of 708191254681 is 186452191807.

The square root of 708191254681 is 841541.

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.

It can be written as a sum of positive squares in only one way, i.e., 380801302281 + 327389952400 = 617091^2 + 572180^2 .

It is not a de Polignac number, because 708191254681 - 2¹⁹ = 708190730393 is a prime.

It is a super-2 number, since 2×708191254681² (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 (708191254621) 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, 420771 + ... + 1262311.

Almost surely, 2^708191254681 is an apocalyptic number.

708191254681 is the 841541-st square number.

708191254681 is the 420771-st centered octagonal number.

It is an amenable number.

708191254681 is a deficient number, since it is larger than the sum of its proper divisors (841542).

708191254681 is an frugal number, since it uses more digits than its factorization.

708191254681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1683082 (or 841541 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 52.

The spelling of 708191254681 in words is "seven hundred eight billion, one hundred ninety-one million, two hundred fifty-four thousand, six hundred eighty-one".