320689681790 has 16 divisors (see below), whose sum is σ = 577277375040. Its totient is φ = 128267884320.

The previous prime is 320689681783. The next prime is 320689681799. The reversal of 320689681790 is 97186986023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320689681799) 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, 828566 + ... + 1152345.

It is an arithmetic number, because the mean of its divisors is an integer number (36079835940).

Almost surely, 2^320689681790 is an apocalyptic number.

320689681790 is a deficient number, since it is larger than the sum of its proper divisors (256587693250).

320689681790 is a wasteful number, since it uses less digits than its factorization.

320689681790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1997107.

The product of its (nonzero) digits is 7838208, while the sum is 59.

The spelling of 320689681790 in words is "three hundred twenty billion, six hundred eighty-nine million, six hundred eighty-one thousand, seven hundred ninety".