320261064642 has 48 divisors (see below), whose sum is σ = 709885874880. Its totient is φ = 104315836896.

The previous prime is 320261064637. The next prime is 320261064647. The reversal of 320261064642 is 246460162023.

320261064642 is a `hidden beast` number, since 3 + 2 + 0 + 2 + 6 + 1 + 0 + 6 + 4 + 642 = 666.

It is an interprime number because it is at equal distance from previous prime (320261064637) and next prime (320261064647).

It is a junction number, because it is equal to n+sod(n) for n = 320261064597 and 320261064606.

It is not an unprimeable number, because it can be changed into a prime (320261064647) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 725533 + ... + 1080240.

It is an arithmetic number, because the mean of its divisors is an integer number (14789289060).

Almost surely, 2^320261064642 is an apocalyptic number.

320261064642 is an abundant number, since it is smaller than the sum of its proper divisors (389624810238).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

320261064642 is a wasteful number, since it uses less digits than its factorization.

320261064642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1806007 (or 1806004 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 36.

The spelling of 320261064642 in words is "three hundred twenty billion, two hundred sixty-one million, sixty-four thousand, six hundred forty-two".