464218681 has 4 divisors (see below), whose sum is σ = 465354100. Its totient is φ = 463083264.

The previous prime is 464218673. The next prime is 464218693. The reversal of 464218681 is 186812464.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 450118656 + 14100025 = 21216^2 + 3755^2 .

It is a cyclic number.

It is not a de Polignac number, because 464218681 - 2³ = 464218673 is a prime.

It is a super-2 number, since 2×464218681² = 430997967578759522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (464218981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 567096 + ... + 567913.

It is an arithmetic number, because the mean of its divisors is an integer number (116338525).

Almost surely, 2^464218681 is an apocalyptic number.

It is an amenable number.

464218681 is a deficient number, since it is larger than the sum of its proper divisors (1135419).

464218681 is a wasteful number, since it uses less digits than its factorization.

464218681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1135418.

The product of its digits is 73728, while the sum is 40.

The square root of 464218681 is about 21545.7346358856. The cubic root of 464218681 is about 774.2969307445.

The spelling of 464218681 in words is "four hundred sixty-four million, two hundred eighteen thousand, six hundred eighty-one".