320463253661 has 4 divisors (see below), whose sum is σ = 323299211772. Its totient is φ = 317627295552.

The previous prime is 320463253633. The next prime is 320463253673. The reversal of 320463253661 is 166352364023.

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 62215324900 + 258247928761 = 249430^2 + 508181^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320463253661 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320463253631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1417978886 + ... + 1417979111.

It is an arithmetic number, because the mean of its divisors is an integer number (80824802943).

Almost surely, 2^320463253661 is an apocalyptic number.

It is an amenable number.

320463253661 is a deficient number, since it is larger than the sum of its proper divisors (2835958111).

320463253661 is a wasteful number, since it uses less digits than its factorization.

320463253661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2835958110.

The product of its (nonzero) digits is 466560, while the sum is 41.

The spelling of 320463253661 in words is "three hundred twenty billion, four hundred sixty-three million, two hundred fifty-three thousand, six hundred sixty-one".