464620820161 has 3 divisors (see below), whose sum is σ = 464621501793. Its totient is φ = 464620138530.

The previous prime is 464620820159. The next prime is 464620820171. The reversal of 464620820161 is 161028026464.

The square root of 464620820161 is 681631.

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 is not a de Polignac number, because 464620820161 - 2¹ = 464620820159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (464620820101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 340816 + ... + 1022446.

It is an arithmetic number, because the mean of its divisors is an integer number (154873833931).

Almost surely, 2^464620820161 is an apocalyptic number.

464620820161 is the 681631-st square number.

464620820161 is the 340816-th centered octagonal number.

It is an amenable number.

464620820161 is a deficient number, since it is larger than the sum of its proper divisors (681632).

464620820161 is an frugal number, since it uses more digits than its factorization.

464620820161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1363262 (or 681631 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 40.

The spelling of 464620820161 in words is "four hundred sixty-four billion, six hundred twenty million, eight hundred twenty thousand, one hundred sixty-one".