463816843681 has 3 divisors (see below), whose sum is σ = 463817524723. Its totient is φ = 463816162640.

The previous prime is 463816843649. The next prime is 463816843687. The reversal of 463816843681 is 186348618364.

The square root of 463816843681 is 681041.

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., 19087909281 + 444728934400 = 138159^2 + 666880^2 .

It is not a de Polignac number, because 463816843681 - 2⁵ = 463816843649 is a prime.

It is a super-2 number, since 2×463816843681² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (463816843687) 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, 340521 + ... + 1021561.

Almost surely, 2^463816843681 is an apocalyptic number.

463816843681 is the 681041-st square number.

463816843681 is the 340521-st centered octagonal number.

It is an amenable number.

463816843681 is a deficient number, since it is larger than the sum of its proper divisors (681042).

463816843681 is an frugal number, since it uses more digits than its factorization.

463816843681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1362082 (or 681041 counting only the distinct ones).

The product of its digits is 15925248, while the sum is 58.

The spelling of 463816843681 in words is "four hundred sixty-three billion, eight hundred sixteen million, eight hundred forty-three thousand, six hundred eighty-one".