320464407781 has 8 divisors (see below), whose sum is σ = 366253544384. Its totient is φ = 274677397920.

The previous prime is 320464407773. The next prime is 320464407793. The reversal of 320464407781 is 187704464023.

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

It is a cyclic number.

It is not a de Polignac number, because 320464407781 - 2³ = 320464407773 is a prime.

It is a super-2 number, since 2×320464407781² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320464407701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194535 + ... + 823876.

It is an arithmetic number, because the mean of its divisors is an integer number (45781693048).

Almost surely, 2^320464407781 is an apocalyptic number.

It is an amenable number.

320464407781 is a deficient number, since it is larger than the sum of its proper divisors (45789136603).

320464407781 is a wasteful number, since it uses less digits than its factorization.

320464407781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1063371.

The product of its (nonzero) digits is 903168, while the sum is 46.

The spelling of 320464407781 in words is "three hundred twenty billion, four hundred sixty-four million, four hundred seven thousand, seven hundred eighty-one".