320749381792 has 48 divisors (see below), whose sum is σ = 725673416832. Its totient is φ = 136704533760.

The previous prime is 320749381727. The next prime is 320749381853. The reversal of 320749381792 is 297183947023.

It is a happy number.

It is a super-2 number, since 2×320749381792² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3915028 + ... + 3996115.

It is an arithmetic number, because the mean of its divisors is an integer number (15118196184).

Almost surely, 2^320749381792 is an apocalyptic number.

320749381792 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

320749381792 is an abundant number, since it is smaller than the sum of its proper divisors (404924035040).

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

320749381792 is a wasteful number, since it uses less digits than its factorization.

320749381792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7911341 (or 7911333 counting only the distinct ones).

The product of its (nonzero) digits is 4572288, while the sum is 55.

The spelling of 320749381792 in words is "three hundred twenty billion, seven hundred forty-nine million, three hundred eighty-one thousand, seven hundred ninety-two".