1898299772944 has 135 divisors (see below), whose sum is σ = 3845081631447. Its totient is φ = 907885135872.

The previous prime is 1898299772939. The next prime is 1898299772977. The reversal of 1898299772944 is 4492779928981.

The square root of 1898299772944 is 1377788.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 59346806544 + 1838952966400 = 243612^2 + 1356080^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 19570100704 + ... + 19570100800.

Almost surely, 2^{1898299772944} is an apocalyptic number.

1898299772944 is the 1377788-th square number.

It is an amenable number.

1898299772944 is an abundant number, since it is smaller than the sum of its proper divisors (1946781858503).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1898299772944 is an frugal number, since it uses more digits than its factorization.

1898299772944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442 (or 219 counting only the distinct ones).

The product of its digits is 1316818944, while the sum is 79.

The spelling of 1898299772944 in words is "one trillion, eight hundred ninety-eight billion, two hundred ninety-nine million, seven hundred seventy-two thousand, nine hundred forty-four".