320464615781 has 8 divisors (see below), whose sum is σ = 338870531328. Its totient is φ = 302562972000.

The previous prime is 320464615771. The next prime is 320464615837. The reversal of 320464615781 is 187516464023.

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 320464615781 - 2²⁶ = 320397506917 is a prime.

It is a super-2 number, since 2×320464615781² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320464615771) 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, 126066635 + ... + 126069176.

It is an arithmetic number, because the mean of its divisors is an integer number (42358816416).

Almost surely, 2^320464615781 is an apocalyptic number.

320464615781 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

320464615781 is a deficient number, since it is larger than the sum of its proper divisors (18405915547).

320464615781 is a wasteful number, since it uses less digits than its factorization.

320464615781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252135883.

The product of its (nonzero) digits is 967680, while the sum is 47.

The spelling of 320464615781 in words is "three hundred twenty billion, four hundred sixty-four million, six hundred fifteen thousand, seven hundred eighty-one".