320421588628 has 6 divisors (see below), whose sum is σ = 560737780106. Its totient is φ = 160210794312.

The previous prime is 320421588607. The next prime is 320421588629. The reversal of 320421588628 is 826885124023.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 168873327364 + 151548261264 = 410942^2 + 389292^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320421588629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40052698575 + ... + 40052698582.

Almost surely, 2^320421588628 is an apocalyptic number.

It is an amenable number.

320421588628 is a deficient number, since it is larger than the sum of its proper divisors (240316191478).

320421588628 is a wasteful number, since it uses less digits than its factorization.

320421588628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80105397161 (or 80105397159 counting only the distinct ones).

The product of its (nonzero) digits is 1474560, while the sum is 49.

The spelling of 320421588628 in words is "three hundred twenty billion, four hundred twenty-one million, five hundred eighty-eight thousand, six hundred twenty-eight".