320637889450 has 12 divisors (see below), whose sum is σ = 596386474470. Its totient is φ = 128255155760.

The previous prime is 320637889433. The next prime is 320637889459. The reversal of 320637889450 is 54988736023.

It can be written as a sum of positive squares in 3 ways, for example, as 309777956929 + 10859932521 = 556577^2 + 104211^2 .

It is a junction number, because it is equal to n+sod(n) for n = 320637889391 and 320637889400.

It is not an unprimeable number, because it can be changed into a prime (320637889459) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3206378845 + ... + 3206378944.

Almost surely, 2^320637889450 is an apocalyptic number.

320637889450 is a deficient number, since it is larger than the sum of its proper divisors (275748585020).

320637889450 is a wasteful number, since it uses less digits than its factorization.

320637889450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6412757801 (or 6412757796 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 55.

The spelling of 320637889450 in words is "three hundred twenty billion, six hundred thirty-seven million, eight hundred eighty-nine thousand, four hundred fifty".