321856053490 has 16 divisors (see below), whose sum is σ = 580717010520. Its totient is φ = 128436618240.

The previous prime is 321856053481. The next prime is 321856053503. The reversal of 321856053490 is 94350658123.

It can be written as a sum of positive squares in 4 ways, for example, as 70932201561 + 250923851929 = 266331^2 + 500923^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 321856053490.

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, 38220975 + ... + 38229394.

Almost surely, 2^321856053490 is an apocalyptic number.

321856053490 is a deficient number, since it is larger than the sum of its proper divisors (258860957030).

321856053490 is a wasteful number, since it uses less digits than its factorization.

321856053490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76450797.

The product of its (nonzero) digits is 777600, while the sum is 46.

The spelling of 321856053490 in words is "three hundred twenty-one billion, eight hundred fifty-six million, fifty-three thousand, four hundred ninety".