1921483728448 has 14 divisors (see below), whose sum is σ = 3812944273766. Its totient is φ = 960741864192.

The previous prime is 1921483728413. The next prime is 1921483728499. The reversal of 1921483728448 is 8448273841291.

It can be written as a sum of positive squares in only one way, i.e., 1918912021504 + 2571706944 = 1385248^2 + 50712^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15011591565 + ... + 15011591692.

Almost surely, 2^{1921483728448} is an apocalyptic number.

It is an amenable number.

1921483728448 is a deficient number, since it is larger than the sum of its proper divisors (1891460545318).

1921483728448 is an equidigital number, since it uses as much as digits as its factorization.

1921483728448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30023183269 (or 30023183259 counting only the distinct ones).

The product of its digits is 24772608, while the sum is 61.

The spelling of 1921483728448 in words is "one trillion, nine hundred twenty-one billion, four hundred eighty-three million, seven hundred twenty-eight thousand, four hundred forty-eight".