320866735401 has 15 divisors (see below), whose sum is σ = 479327059981. Its totient is φ = 213907758228.

The previous prime is 320866735327. The next prime is 320866735487. The reversal of 320866735401 is 104537668023.

The square root of 320866735401 is 566451.

It is a perfect power (a square), and thus also a powerful number.

320866735401 is a `hidden beast` number, since 3 + 20 + 86 + 6 + 7 + 3 + 540 + 1 = 666.

It is not a de Polignac number, because 320866735401 - 2¹¹ = 320866733353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320866735201) 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 14 ways as a sum of consecutive naturals, for example, 5066590 + ... + 5129528.

Almost surely, 2^320866735401 is an apocalyptic number.

320866735401 is the 566451-st square number.

320866735401 is the 283226-th centered octagonal number.

It is an amenable number.

320866735401 is a deficient number, since it is larger than the sum of its proper divisors (158460324580).

320866735401 is an frugal number, since it uses more digits than its factorization.

320866735401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125890 (or 62942 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The spelling of 320866735401 in words is "three hundred twenty billion, eight hundred sixty-six million, seven hundred thirty-five thousand, four hundred one".