320406649861 has 8 divisors (see below), whose sum is σ = 341450936064. Its totient is φ = 299955160560.

The previous prime is 320406649837. The next prime is 320406649879. The reversal of 320406649861 is 168946604023.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 320406649861 - 2¹³ = 320406641669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320406649261) 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 7 ways as a sum of consecutive naturals, for example, 148198110 + ... + 148200271.

It is an arithmetic number, because the mean of its divisors is an integer number (42681367008).

Almost surely, 2^320406649861 is an apocalyptic number.

It is an amenable number.

320406649861 is a deficient number, since it is larger than the sum of its proper divisors (21044286203).

320406649861 is a wasteful number, since it uses less digits than its factorization.

320406649861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296398451.

The product of its (nonzero) digits is 1492992, while the sum is 49.

The spelling of 320406649861 in words is "three hundred twenty billion, four hundred six million, six hundred forty-nine thousand, eight hundred sixty-one".